In the early 90s, on two separate occasions, I was offered
"3 Altos" for just a few dollars (one batch was from Stanford that had been using them for printer servers, and I don't remember where the second batch came from).
Over the years I wound up donating them to various places (the Computer History Museum, the Kyoto Prize museum, the Boston Science Museum, etc.). We kept one at Viewpoints as a mascot, and my last one I gave to Sam Altman because he wanted to do a restoration. That one turned out to be a late hybrid that Ken Shirriff and company are having fun puzzling out.
The "random mouse on ebay" was at my suggestion, because the Alto I donated to Sam didn't have a mouse.
Most of the original runs of Alto IIs (at least 1500 of them were built) cost in 70s dollars about $22.5K apiece. Inflation (according to the web) since then has been about a factor of 5, so each Alto would have been about $112.5K (and I'd love to have a $112.5K personal computer today -- that would really be "computing in the future" as we did at Parc).