The HHKB Pro 1 was and still is really popular and if you were lucky last year you could "somewhat" readily find one for sub-$200 and the year before that sub-$150. Another neato feature is that some of the Pro 1's have slightly thicker and slightly heavier keycaps too! I doubt it makes a reasonable difference though, I barely notice it, barely. Some might also like the missing logo in the bottom right. They seem to be going back over $250 now which might be something to consider if you make open offers. I personally would shoot for a black version since some of the white cases discolored a little bit.
I would also try ebay, but get creative with the search words. Unfortunately at this point I think everyone has wised up.
If the HHKB Pro III (cue ripster) shows up this month I might just sell you mine.
