Well, if you want it now, you'll pay dearly. On eBay, auctions on 6100's seem to be closing anywhere from $480 to $620. Presumably, that will come down quickly as availability increases.

Personally, I think I want the 7250 (with the built-in camera, but more importantly, with SyncML support and all the other bells and whistles I could ever want in what's still a fairly small package). This doesn't seem to be available anywhere yet.