RSSCHNECK: I'd give up on National for a 1 day rental. I went round and round trying to get a decent rate, but unless you're renting from them for enough time to be eligible for the weekly rates, it seems impossible to get a good rate from them.
Ryan849: BJ's is a membership wholesale club, like Costco. I know they're in the Northeast, but I don't know if there are any around you. Annual membership is about $40, so it probably wouldn't be worth it to join just for a car rental coupon anyway. But they do have some good rates. I'm using their
Budget rates and coupons and getting a Grand Marquis for 4 days from Budget for about $120. I know I could get a much better weekly rate from any of the companies, but for a 4 day rental, that was the best I could find.