It is funny how our memories become selective.
This time a year ago the SSKs were in the midst of a price spike, and shabby ones were going for $250-300 and great ones for nearly twice that.
After patiently waiting for 2-3 years to get a cheap one (broken, even) I was one of Cindy's "Lucky 10" a couple of months ago and got one of those NIB black labels for $165 shipped.
I engaged in a bidding war about 3 years ago when F ATs were scarce and pricey, and contributed to a couple-of-months' period where the very few that hit ebay sold in the ~$150 range, very high at the time.
After buying and selling at least half a dozen F XTs over a 2 year period a couple of years ago, at prices in the $10-$30 range, I am astonished to see them bringing $100 now! I understand that you need an XT to use as a framework to build an XTant, but how many people are really going to do that? Do significant numbers of people find the XT layout acceptable? Or are people collecting them "just because?"
The SSK market does make sense, because that is a keyboard that an ordinary person really would buy and use on a day-to-day basis.