I think the significance of these later pieces depends on the fragmentation of the market. There was only one IBM AT, it was the first 80286 IBM machine, and created the 16-bit ISA bus that is still found in machines today. That's pretty significant. At the 80386 introduction, there were two firsts -- the Compaq Deskpro 386 and the IBM PS/2 80 (the Compaq was first, as I recall). Those machines are borderline collectable, in my opinion. By the time the 80486 rolled around, there were no firsts, the industry had evolved to a group of OEMs serviced by Intel, of which IBM was only a peer. Had EISA taken off, perhaps the first EISA machine would have been collectible, but personally, I don't think there is anything in the x86 desktop arena after the Deskpro 386-PS/2 80 that's collectible. Late '80s to present, the only things of interest are pioneering units of other architectures and/or form factors, such as the Newton OMP (Original MessagePad), NeXt cube, etc. Kai