It was like $14/day through priceline. The car was gross and smelled like old people. But the biggest problem I had was that they had no way to modify the reservation. I didn't know exactly how long it would take to fix the car, so I rented for 3 weeks. It ended up taking over 4, but at the end of the 3 weeks they had no way of extending the rental and it was going to take having to make a new reservation, drive in to return the car, and get a new car for the last week.
But it ended up being like 1/3 the cost of what it would have been going through a regular rental company.