Probably not until faster cards are released. NV40 and r420 will probably be launched in March, so you may have to wait until then or perhaps a little earlier as vendors try to reduce inventory before the new parts are released.
If we are lucky maybe we will get one more speed bump before then and see a $50 price drop across the board on lower cards.
edit: I'm assuming when you say below $300 you do not want it @
$299