I bought some more stuff, should get here soon:

Saturn:
Ultimate MK3 - Saturn Beta on Sega Mega CD-R

PSX/PS2:
Tomb Raider 5/20 E3 tech demo (one big open level you can run Lara around)
Gex 3 12/30/98 Preview
Primal ECTS 10/10/02
Medievil II ME2 0.51 reviewable
M.E. II 12/20/99
Spot Demo PSX 1/24/96 preview
EWJ PWA2 11/28 MB Left on Activistion brand CDR
TR3-PSX v.10.5.98 EIDOS
Kain 8/17 F #5 Preview
Monkey Hero PSX NTSC 8/27/98 Blam!
Medievil .35 7/10
Crash Bandicoot - pre-beta
Sandman (PS2, unreleased)
Cardinal Syn - Preview 10/16
Overblood - Preview copy in Japanese - 1/24/97 on Electronic Arts branded CDR
Syphon Filter - #35 - 1/19
Syphon Filter - #1 - 9/21
Syphon Filter Disc #1 1/11/build Cheat included
Kingdom Hearts II beta
Rayman 3 - preview 11/20
Digimon World 4 - 2/9/04
Gubble v2.0 on Actual branded CDR
Stella Deus - Preview ROM