Well, my 3dfx collection was never so large. Limited to just the following (that I actually paid with my own money).
Guillemot Maxi-Gamer 3D (Voodoo 1)
Creative Labs 12mb V2 SLI
3dfx STB 12mb V2 SLI
Wicked3D 12mb V2
I jumped on the TnT2Ultra bandwagon when the V3 (really "Banshee II") came out and it didn't seem to be that great of an improvement from my then current SLI setup. The V2 was 3dfx's greatest achievement, bar none.
The Creative cards are the only ones I still have now. Used them for over 3.5 straight years before I finally retired both cards about two years ago when I stopped playing Diablo II (the last great Glide game). Thinking back, the $550 I spent for both cards in 1998 was actually a pretty good deal considering the mileage I've gotten out of them.
Anyway, I've decided recently that I'll never sell these card off. They're officially in my private hardware "hall of fame" now. I just wish I kept the boxes for them.