I got a mini from ebay sellers refreshcomputers. Arrive well-packed but missing two keycaps. The board was in good shape and structurally sound, but there was a lot of wear on the double-mapped keys (JKL, etc.) No surprise: it was quite dirty.
What bothers me is that the board is not the one in his auctions. That one is in better condition, doesn't have the wear, and isn't missing caps. To be fair, mine doesn't have the scraps seen on the one in the auction.
I've emailed him to see if he can send me some keys and make things right. I'd deal with him but consider yourself warned.
btw- it's a 1991, US made, with 2-part keys. grey label.