Update at 8:35 a.m. PDT: Alas, the player is no longer available at that price, and the sideline deal on the Samsung BDP-1500 Blu-ray player (posted earlier) appears to have disappeared from RadioShack's site.
Online clearinghouse Second Act has refurbished Sharp BD-HP20U Blu-ray players for $169.99. Ground shipping will run you about $15. According to the product page, this deal ended Sunday, so I don't know how much longer it'll be available.
Because it's a refurb, it comes with only a 30-day warranty (but at least it's from the manufacturer). Plus, CNET had a fairly lengthy list of complaints about the player, though I don't consider any of them deal-breakers. (You can read my own review of the BD-HP20U over at Wired's Gadget Lab.) This is by far the lowest price I've seen on a Blu-ray player, so if you're in the market, act fast.