If it helps anyone, I made myself a list of everything available in the GB with their respective prices listed. The prices reflect the previous products that I already own so make sure you log into their site to see the right pricing:
Amplitube 5 $199.99
Amplitube 5 SE $149.99
AmpliTube Brian May $99.99
Amplitube Dimebag Darrell CFH Collection $99.99
AmpliTube Fender Collection $99.99
AmpliTube Fender Collection 2 $149.99
Amplitube Fulltone Collection $59.99
AmpliTube Jimi Hendrix Anniversary $99.99
AmpliTube Joe Satriani $99.99
AmpliTube Leslie $129.99
AmpliTube MESA/Boogie $149.99
AmpliTube Metal $99.99
AmpliTube Orange $99.99
AmpliTube Slash $99.99
AmpliTube SVX $99.99
AmpliTube SVX 2 $99.99
Arc System 3 $149.99
Arc System 3 software only $99.99
Hammond B3-X $199.99
Lurssen Mastering Console $159.99
Miroslav Philharmonik 2 $299.99
Miroslav Philharmonik 2 CE $149.99
MIXBOX $199.99
MODO Bass $199.99
MODO Bass SE $149.99
MODO Drum $199.99
MODO Drum SE $149.99
SampleTank 4 $199.99
SampleTank 4 SE $149.99
SampleTank Instrument: Alan Parsons Imperial Grand $79.99
SampleTank Instrument: Alternate Keys $79.99
SampleTank Instrument: American Acoustic $79.99
SampleTank Instrument: Art Deco Piano $79.99
SampleTank Instrument: Billy Cobham Drums $79.99
SampleTank Instrument: Brandenburg Piano $79.99
SampleTank Instrument: Chillout $39.99
SampleTank Instrument: Cinekinetik: Fractured Piano $49.99
SampleTank Instrument: Cinekinetik: Malletension $49.99
SampleTank Instrument: Cinekinetik: Malletopia $49.99
SampleTank Instrument: Cinekinetik: Shipwreck Piano $49.99
SampleTank Instrument: Cinematic Percussion $99.99
SampleTank Instrument: Clavitube $79.99
SampleTank Instrument: Deep House $39.99
SampleTank Instrument: Drum'n'Bass $39.99
SampleTank Instrument: Electromagnetik: Electric Grand C70P $49.99
SampleTank Instrument: Electromagnetik: Electric Piano Bass $49.99
SampleTank Instrument: Electromagnetik: Stage 73 Mark V $49.99
SampleTank Instrument: Electromagnetik: Wurly Model 120 $49.99
SampleTank Instrument: Future Synths $79.99
SampleTank Instrument: Hardcore $39.99
SampleTank Instrument: Hitmaker: EDM $49.99
SampleTank Instrument: Hitmaker: Reggaeton $49.99
SampleTank Instrument: Hitmaker: Synthwave $49.99
SampleTank Instrument: Hitmaker: Trap $49.99
SampleTank Instrument: Hugh Padgham Drums $79.99
SampleTank Instrument: Indie Dance $39.99
SampleTank Instrument: L.A. Confidential $99.99
SampleTank Instrument: London Grooves $79.99
SampleTank Instrument: Minimal $39.99
SampleTank Instrument: Nanotube $39.99
SampleTank Instrument: Neil Peart Drums $79.99
SampleTank Instrument: NRG $39.99
SampleTank Instrument: Orchestral Percussion $99.99
SampleTank Instrument: Power Up $39.99
SampleTank Instrument: Spaceport 77 $79.99
SampleTank Instrument: Techno $39.99
SampleTank Instrument: Terry Bozzio Drums $79.99
SampleTank Instrument: The Grid $39.99
SampleTank Instrument: Trance $39.99
SampleTron 2 $199.99
Syntronik $199.99
Syntronik Deluxe $269.99
Syntronik Instrument: 99 $49.99
Syntronik Instrument: Blau $49.99
Syntronik Instrument: Bully $49.99
Syntronik Instrument: DCO-X $49.99
Syntronik Instrument: Galaxy $49.99
Syntronik Instrument: Harpy 260 $49.99
Syntronik Instrument: J-60 $49.99
Syntronik Instrument: J-8 $49.99
Syntronik Instrument: M-Poly $49.99
Syntronik Instrument: Memory-V $49.99
Syntronik Instrument: Minimod $49.99
Syntronik Instrument: Modulum $49.99
Syntronik Instrument: Noir $49.99
Syntronik Instrument: OXa $49.99
Syntronik Instrument: Polymorph $49.99
Syntronik Instrument: Pro-V $49.99
Syntronik Instrument: SAM $49.99
Syntronik Instrument: SH-V $49.99
Syntronik Instrument: String Box $49.99
Syntronik Instrument: T-03 $49.99
Syntronik Instrument: V-80 $49.99
Syntronik Instrument: VCF3 $49.99
T-RackS 5 $149.99
T-RackS 5 Deluxe $299.99
T-RackS 5 SE $149.99
T-RackS Singles: Black 76 Limiting Amplifier $79.99
T-RackS Singles: Brickwall Limiter $49.99
T-RackS Singles: British Channel $99.99
T-RackS Singles: Bus Compressor $99.99
T-RackS Singles: Classic T-RackS Clipper $49.99
T-RackS Singles: Classic T-RackS Compressor $49.99
T-RackS Singles: Classic T-RackS Multi-band Limiter $49.99
T-RackS Singles: Comprexxor $129.99
T-RackS Singles: CSR Hall Reverb $49.99
T-RackS Singles: CSR Inverse Reverb $49.99
T-RackS Singles: CSR Plate Reverb $49.99
T-RackS Singles: CSR Room Reverb $49.99
T-RackS Singles: De-esser $49.99
T-RackS Singles: Dyna-Mu $124.99
T-RackS Singles: EQ 73 $99.99
T-RackS Singles: EQ 81 $99.99
T-RackS Singles: EQ PA $99.99
T-RackS Singles: EQ PB $99.99
T-RackS Singles: EQ PG $99.99
T-RackS Singles: EQP-1A Vintage Tube Program Equalizer $79.99
T-RackS Singles: EQual $99.99
T-RackS Singles: Full Metering Section for T-RackS 5 $99.99
T-RackS Singles: Linear Phase Equalizer $49.99
T-RackS Singles: Master EQ 432 $124.99
T-RackS Singles: Master Match $99.99
T-RackS Singles: Mic Room $49.99
T-RackS Singles: ONE $99.99
T-RackS Singles: Opto Compressor $49.99
T-RackS Singles: Precision Comp/Limiter $99.99
T-RackS Singles: Quad Comp $79.99
T-RackS Singles: Quad Image $79.99
T-RackS Singles: Quad Lim $79.99
T-RackS Singles: Saturator X $79.99
T-RackS Singles: Space Delay $99.99
T-RackS Singles: Stealth Limiter $124.99
T-RackS Singles: Sunset Sound Studio Reverb $149.99
T-RackS Singles: T-RackS Leslie $129.99
T-RackS Singles: Tape Echo $79.99
T-RackS Singles: Tape Machine 24 $99.99
T-RackS Singles: Tape Machine 440 $99.99
T-RackS Singles: Tape Machine 80 $99.99
T-RackS Singles: Tape Machine 99 $99.99
T-RackS Singles: Vintage Tube Compressor/Limiter Model 670 $79.99
T-RackS Singles: White 2A Leveling Amplifier $79.99
T-RackS Singles: White Channel $99.99
FWIW, some folks have recommended buying the 200 or 300 pack of gear credits and applying jam points to get an extra 30% off. That takes the cost down to $112 for 200 credits and $157 for 300 credits, respectively.