Is there a way to rebid rental cars on Priceline? I tried to but told me it was a duplicate bid and I must wait 24 hours. Since I have never done rental cars on PL but have done hotel and familiar with rebid tricks, I tried a few strategies. First I vary the car classes and instead of asking for mid-size I asked for standard and got one more bid in, but failed. Then I tried full size it won't let me. Initially I had a pick up time one day at noon, and the drop off time a few days later at noon. So I varied that a bit and made my pick up time 11am and drop off at 11am and was able to get one more bid in. However, when I tried to use a pickup time of noon one day, then a drop off time of 11:30am, thinking I can do nine combinations using 11:00, 11:30 and noon as variations of both drop off and pick up times, it didn't let me do any more than two combinations. With my flight scheduled to arrive at say 11:24am, a pick up time of 11, 11:30, 12 are all fine with me anyways. There must be some internal constraint to prohibit "minor" variations of times?