For the last few months I've been following the market for FingerWorks TouchStream keyboards on eBay. This was a keyboard that, at the time FingerWorks ceased operations in 2005, was selling new for $350.
Since I've been tracking this, I don't believe a TouchStream has ever sold for less than something on the order of $650. About three weeks ago, one sold for $669 and another sold for $689, both from the same seller. I'm not sure I would have entrusted that kind of dough to this seller, because her descriptions were blatantly lifted verbatim from other TouchStream listings on eBay.
Last weekend, a TouchStream LP sold for $1,075.
This past week, three TouchStream LPs were listed, all with bidding ending this weekend. The first of them sold for $1,226.04 last night. The second one ended this morning with a high bid of over $1,800!! But for some reason this one was delisted or canceled soon after the end of bidding, so I don't know what happened there. The third one sold for $1,525.
Entering into the weekend, all three listings had the same high bidder. If I remember correctly, his high bids were a little over $500 for two of the listings, and something like $330 for the third one. But this was before the bidding got serious. I'm pretty sure he was the one who won the third listing, the one with a winning bid of $1,525.
So if you think paying over $260 for a Happy Hacking Professional 2 is insane, you ain't seen nothing.
Me, I'm just wondering if we'll ever see an IBM M15 for sale ever again on eBay. That would be my personal Holy Grail of keyboards.