Reaaaaaaally cheap. Guy's asking $220 for his 20GB PS3 with Ridge Racer 7 and an unnamed Blu-Ray. Posted less than an hour ago, so he might still have it if you're looking for an uber-cheap PS3 with full BC.
http://sfbay.craigslist.org/sby/ele/573156228.html
http://sfbay.craigslist.org/sby/ele/573156228.html