There is one other Las Vegas option that Priceline is good for - IF you have a rental car AND if you don't mind an off-strip hotel, bargains at the 2.5* level can be had.

For example, 2.5* Airport area bids often get the Courtyard or Residence Inn in Green Valley (across the street from each other). Free HSIA, parking near your room, clean and well-run, and adjacent shopping (including a Trader Joes). And you're about 6 miles from the Strip via less-congested roads.