My least used is a tie between three....
- Mac SE FDHD - No Network card, so it's a royal PITA getting software on it. Plus I have four 486 systems that all run a Mac Emulator that's just about as fiddly, but at least I can download the SIT Files directly to those systems, rather than window shop E-bay for some ultra rare hard to get PDS expansion card that costs $240.00 and means I need to break out my hibatchi-skewer CRT discharge stick to install.
- NEC Ready 9522 - Let's see, a rare LPX tower Pentium 100 with 128MB of RAM (but subpar video and audio) gets eaten alive by a far more beat up Versa P/75 laptop....heck, my M75 486 DX4 eats this thing alive performance wise in a lot of things somehow - and the Versa have 40MB of RAM, not 128MB. Heh, oh well. Also, I just don't have a lot of passion for Pentiums and up....I feel like that's when the PC industry started to get boring for me.
- Dell Dimension 3000 P4 - I picked this up as a TV gaming rig only for me to immediatley after realize I could do the same with my second Linux system and run anything and everything I want....or better yet, throw the Retro Computers through a composite converter. Actually, If I found a quarter-height 5.25", I could narrow down to two - the Tandy and the Versas - and leave those plugged into the AV switch to the CRT TV, with the Monitors still attached for when I want a full computer experience.
I'll probably be selling those eventually. TBH, I'm more interested in laptops these days because they are portable and I don't need to always be at a desk to use one. Plus I'm kind of enjoying the whole "vice grip garage"-like approach I've been taking lately......
"A guy's gonna do the right thing and, well....put this ol' laptop on the internet and download all 2.6GB worth of data needed to make it a fully functional device. It's not been used since 1994, it's been in someone's junk drawer ever since, she's got some weight reduction around the PCMCIA slots....anyway, let's check in the bag and see if there are any spare parts.....well, there's a batt'ry, and another batt'ry.......I think I'll zap em' with my lightning block over here....."