The Washburn PS signature series is almost labyrinthine in the number of models and catalogue listings over the years. See this overview to get a better grasp of what happened and when.
PS2000 BLACK

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Abalone block split diagonally
Body: Mahogany
Top: Maple
Binding: Multiple-layer (extending to headstock)
Bridge: Tune-o-matic w/ PST25 stop tailpiece
Pickguard: Chrome
Pickups: 2 chrome-covered humbuckers
Chrome hardware

Available 1998-2002. Some 1998's were made with the inlays reversed.
PS500 BLACK

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Dot
Body: Mahogany
Top: n/a
Binding: Single-layer (extending to headstock)
Bridge: Tune-o-matic w/ PST25 stop tailpiece
Pickguard: Black
Pickups: 2 chrome-covered humbuckers
Chrome hardware

Available 1998-2000
PS100 BLACK

Neck: Maple w/ 22 fret rosewood fingerboard
Inlays: Dot
Body: Alder
Top: n/a
Binding: n/a
Bridge: Tune-o-matic
Pickguard: n/a
Pickups: 2 exposed humbuckers
Chrome hardware

Available 1998-2000
PS2000 FLAME CARAMEL BURST

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Abalone block split diagonally
Body: Mahogany
Top: AAA grade flame maple
Binding: Multiple-layer (extending to headstock)
Bridge: Tune-o-matic w/ PST25 stop tailpiece
Pickguard: Creme
Pickups: 2 chrome-covered humbuckers
Nickel hardware

Available 1999-2002. According to some sources just over 50 of this model were produced.
PS2000 BLACK DIAMOND

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Abalone block split diagonally
Body: Mahogany
Top: Unknown
Binding: Multiple-layer (extending to headstock)
Bridge: Tune-o-matic w/ PST25 stop tailpiece
Pickguard: Mirror
Pickups: 2 chrome-covered humbuckers
Chrome hardware

Buzz Feiten tuning. Available 1999. Limited edition of 100.
PS2000 SILVERBURST

Exact same specs as PS2000 Black. Available 2000-2002
PS2000 MILLENNIUM

Same specs as PS2000 Black. Top encrusted with Czech and Austrian crystal rhinestones. Limited edition of 100 (although it appears that just over 60 were actually made). Available 2000-2001.
PS2000 ROSE

Same specs as PS2000 Black. Recreation of Paul's rose tattoo above tailpiece. Limited edition of 50, each handsigned by Paul on the back. Available 2000-2001.
PS9200 "Preacher"

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Pearl block (art deco inlay on headstock)
Body: Mahogany
Top: Unknown
Binding: Eight-layer (extending to headstock)
Color: black, white
Bridge: TonePros stop tailpiece
Pickguard: Black
Pickups: 2 Seymor Duncan Pearly Gates humbuckers
Gold hardware

Although Paul started playing this guitar on stage during his 2006 solo tour it didn't appear in the Washburn catalogue until 2007.
PS9000

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Mother or pearl trapezoid
Body: Mahogany
Top: Unknown
Binding: Single-layer (not extending to headstock)
Color: gold, honeyburst
Bridge: TonePros stop tailpiece
Pickguard: Creme
Pickups: 2 Seymor Duncan Pearly Gates humbuckers
Nickel hardware

Although Paul started playing this guitar (in honeyburst finish) on stage during his 2006 solo tour it didn't appear in the Washburn catalogue until 2007.
PS7200

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Pearl block inlays
Body: Mahogany
Top: Unknown
Binding: Multiple-layer (extending to headstock)
Color: gold, honeyburst
Bridge: Tune-o-matic
Pickguard: Black
Pickups: 2 Egnater humbuckers
Chrome hardware

Although Paul started playing this guitar (in honeyburst finish) on stage during his 2006 solo tour it didn't appear in the Washburn catalogue until 2007.
PS7000

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Trapezoid pearl inlays
Body: Mahogany
Top: Flame maple
Binding: Single-layer (not extending to headstock)
Color: gold, honeyburst
Bridge: Tune-o-matic
Pickguard: Creme
Pickups: 2 Egnater humbuckers
Chrome hardware
PS800

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Split Mother of pearl/Abalone block inlays
Body: Mahogany
Top: Maple
Binding: Single-layer (not extending to headstock)
Color: black
Bridge: TonePros with star tailpiece
Pickguard: Black
Pickups: 2 Seymor Duncan pickups ('59 & JB)
Chrome hardware
PS600

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Bird, leaf or wing inlays
Body: Mahogany
Top: Maple
Binding: Single-layer (not extending to headstock)
Color: black, blue burst, silver burst
Bridge: Tune-o-matic with star tailpiece
Pickguard: Black
Pickups: 2 Egnater humbucker pickups
Chrome hardware

The PS600 also seems to have been produced in a flame honeyburst finish but it was never listed in the catalogue.
PS400 Guitar Pack

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Red dot inlays
Body: Undisclosed ("select wood")
Top: n/a
Binding: n/a
Color: G1, G2, G3, G4 graphics
Bridge: Tune-o-matic wraparound
Pickguard: Black
Pickups: 2 undisclosed humbucker pickups
Chrome hardware

Same body style as the PS600 and PS800. Came in 4 individual graphics (imaginatively named G1-G4) and the guitar pack contained a "custom" strap, Paul Stanley picks, custom gig bag, and a puzzle piece that, if one bought all 4 guitars, formed a "unique Paul Stanley poster".
PS80 Guitar Pack

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Pearl dot inlays
Body: Undisclosed ("select wood")
Top: n/a
Binding: n/a
Color: high gloss black
Bridge: Tune-o-matic
Pickguard: Black w/ Paul Stanley signature
Pickups: 2 undisclosed humbucker pickups
Black chrome hardware

This pack, which was delivered in a full color "Collectible Carton", included a Signature strap, 3 Paul Stanley picks, an exclusive  Paul Stanley photograph, and a custom gig bag.

Although not part of the PS line Paul also designed a version of Washburn's entry-level Lyon guitar pack (see here).

PS7000

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Trapezoid pearl inlays
Body: Mahogany
Top: Flame maple
Binding: Single-layer (not extending to headstock)
Color: blackburst, honeyburst
Bridge: Tune-o-matic
Pickguard: Creme
Pickups: Randall UL & SL humbuckers
Chrome hardware

Apart from the addition of the new blackburst color (in place of the discontinued gold top finish) the PS7000 got new pickups from Randall for the 2008 catalogue. Boogie Street produced 50 each of the PS8500GSB1 and PS8500BSG2.
PS800

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Split Mother of pearl/Abalone block inlays
Body: Mahogany
Top: Maple
Binding: Single-layer (extending to headstock)
Color: cracked mirror
Bridge: TonePros with star tailpiece
Pickguard: n/a
Pickups: 2 Seymor Duncan pickups ('59 & JB)
Chrome hardware

2008 saw the addition of binding on the headstock for all PS800. Apart from the cracked mirror the new finish silver sparkle was also added but I've yet to see one of those pictured. The white PS800 without binding is a highly limited custom run produced by Boogie Street. Paul started using the cracked mirror PS800 on stage in 2007.
PS2000 10th Anniversary

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Mother of pearl/Abalone block split and X inlay at the 12th fret
Body: Mahogany
Top: n/a
Binding: Multiple-layer (extending to headstock)
Color: black, white, cracked mirror
Bridge: TonePros tune-o-matic w/ star tailpiece
Pickguard: Mirror
Pickups: 2 Seymor Duncan humuckers ('59 & JB)
Chrome hardware

Washburns Custom Shop made a small limited run of a matte black version and there appears to be a rhinestone 10th Anniversary as well but it might just be a custom shop version.
PS1800

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Mother of pearl/Abalone block split
Body: Mahogany
Top: n/a
Binding: Single-layer (not extending to headstock)
Color: black, white
Bridge: Tune-o-matic w/ star tailpiece
Pickguard: Black
Pickups: 2 Randall humuckers (UL & Ultra XL)
Chrome hardware

Boogie Street produced a very limited run (25 chrome hardware, 25 gold hardware) exclusive PS1900 with a cracked mirror front.
PSV2200

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Mother of pearl/Abalone block split
Body: Mahogany
Top: n/a
Binding: n/a
Color: black
Bridge: Tone-Pros tune-o-matic
Pickguard: Mirror
Pickups: Seymor Duncan JB humbucker
Chrome hardware

Purple and gold sparkle versions were a very limited 2011 Boogie Street exclusive.
PS2000

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Mother of pearl/Abalone block split
Body: Mahogany
Top: n/a
Binding: Multiple-layer (extending to headstock)
Color: black, white, cracked mirror, rhinestone
Bridge: TonePros tune-o-matic w/ star tailpiece
Pickguard: Mirror
Pickups: 2 Seymor Duncan humuckers ('59 & JB)
Chrome hardware

2010 saw the re-appearance of the rhinestone PS2000. Both cracked mirror and rhinestone versions lacked a pickguard. In 2011 the Washburn custom shop produced a very limited run of PS2000 Flame Caramelburst (although it looks more like a sunburst).
PS1800

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Mother of pearl/Abalone block split
Body: Mahogany
Top: n/a
Binding: Single-layer (not extending to headstock)
Color: black, white, cracked mirror
Bridge: Tune-o-matic w/ star tailpiece
Pickguard: Black
Pickups: 2 unspecified humuckers
Chrome hardware

The catalogue picture of the cracked mirror PS1800 lacked a pickguard but every single one I've seen available for sale (as pictured above) has had a black pickguard. Although not in the catalogue Washburn also produced a PS1800 rhinestone. The rhinestones inlayed on the PS1800 were much smaller than on the PS2000.
PS2012 "Starfire"

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Mother of pearl/Abalone block split
Body: Mahogany
Top: n/a
Binding: Bound neck
Color: black, white
Bridge: TonePros tune-o-matic w/ star tailpiece
Pickguard: Mirror
Pickups: 2 Seymor Duncan SM3 mini humbuckers
Chrome hardware
PSV2200

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Mother of pearl/Abalone block split
Body: Mahogany
Top: Maple
Binding: n/a
Color: black, white, cracked mirror, rhinestone
Bridge: Tone-Pros tune-o-matic
Pickguard: Mirror
Pickups: Seymor Duncan JB humbucker
Chrome hardware

Cracked mirror and rhinestone versions had single-ply creme binding on the body. Unless previously missed in the 2010-11 catalogue the PSV2200 now gets a maple cap on the mahogany body.
PSV2000

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Mother of pearl/Abalone block split
Body: Mahogany
Top: n/a
Binding: n/a
Color: black, white
Bridge: Tune-o-matic
Pickguard: Mirror
Pickups: Undisclosed humbucker
Chrome hardware
PS2012R

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Mother of pearl/Abalone block split
Body: Mahogany (finished with cellulouse laquer)
Top: n/a
Binding: n/a
Color: cardinal red, pelham blue, golden mist, polaris white
Bridge: TonePros tune-o-matic w/ custom tailpiece
Pickguard: White
Pickups: 2 Seymor Duncan SM3 mini humbuckers
Aged nickel hardware

Authentic relic treatment makes each guitar unique.
PS12

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Mother of pearl/abalone block split
Body: Mahogany
Top: n/a
Binding: n/a
Color: black, white
Bridge: Tune-o-matic w/ star tailpiece
Pickguard: Mirror
Pickups: 2 undisclosed mini humbuckers
Chrome hardware
PS10

Neck: Mahogany (set) w/ 22 fret rosewood fingerboard
Inlays: Pearl dot
Body: Mahogany
Top: n/a
Binding: n/a
Color: black, white
Bridge: Tune-o-matic
Pickguard: White
Pickups: 2 undisclosed mini humbuckers
Chrome hardware
PS2012 "Starfire"

Neck: Mahogany (set) w/ 22 fret ebony fingerboard
Inlays: Mother of pearl/Abalone block split
Body: Mahogany
Top: n/a
Binding: Bound neck
Color: black, white, "Stanleyburst"
Bridge: TonePros tune-o-matic w/ star tailpiece
Pickguard: Mirror
Pickups: 2 Seymor Duncan SM3 mini humbuckers
Chrome hardware

Not listed in the 2013 catalogue, this has so far only appeard on the Washburn web site.