$299 or thereabouts i suspect. virgin mobile has taken several surveys on what a user feels is an acceptable price point and what they'd walk away from and not buy. $299 atleast for me is it. virgin takes surveys via pulse website or something like that,can't recall exactly.
Also, the OV has lots of good roms, it's not like the phone will stop working and not everyone can leave on day one and it takes time for roms to fall behind. Many will still develop for it even after leaving.