Among my regret list are: 1. HP 150 and 9121D, which I traded for: 2. Macintosh Plus in perfect condition 3. 6x NeXT Cubes which I profited on heavily, but liquidated the last three at fire-sale prices. However, I at least managed to trade for a Color Turbo NeXTStation and a few peripherals 4. VAX 4000-500, which was way too big, but very fun 5. VAXstation 4000/VLC in perfect condition
Of all of those, I think I'd take the HP 150 back first. That touch screen was just so fun.