This story reminds me of the time I had a Radio Shack TRS-80 computer with printer for sale. It worked perfectly, until, while the the buyer was driving 40 miles to my place, at which point, I was setting it up and testing it out before he got there and the disk drive broke.
After I explained what happened, he got pissed for having just driven 40 miles to get it.
This was all beyond my control, but it could have been that he had just gotten it home and then the disk drive went out. The TRS-80 was almost an antique when I tried to sell it, so disk drives for these were proprietary items and weren't being made anymore.
