1 x Diamond Monster 3D (Voodoo1 4MB)
1 x Diamond Monster 3D II (Voodoo2 12MB)
2 x STB V2-1000 (Voodoo2 12MB)
1 x Voodoo3 3000 AGP
All of them working, though I haven't used the V3 in a while.
The Monster 3D II is the same one I bought back in late 1998, it is difficult to describe to someone that didn't live that era how radically the performance and graphic quality improved, games that were completely unplayable pixelated messes suddenly became silky smooth and at higher resolutions!
Unfortunately I spent most of my savings on that V2 and had to skimp on the motherboard, ending up with an atrociously buggy PCChips M747. So about a year after that I upgraded to a Soyo P3 board and bought the V3, which I remember working fine but being really disappointing in terms of performance increase vs. what I had experienced with the V2.
I purchased the V1 and STB V2s brand new several years ago (although in bulk packaging, not boxed) from some russian guy who had a massive stock. The prices back then were really low compared to today's insanity, but at the time I actually hesitated to spend around USD 40 in order to have a matching SLI pair! How times have changed...