OK - started bidding on 4* hotels in Montreal on Saturday afternoon, looking for one room for two days in mid-June. My opening bid of $70/night was rejected. Rebid (by adding areas without 4* hotels) at $80, $90 and $100. All rejected. Hotwire shows a 4.5* (which is a 4* in Priceline land, in my experience) at $162, so I figure I'll wait it out until Tuesday (having run out of rebids by exhausting the available areas) and try an even higher bid. Bid $110 and got the Hilton Bonaventure, which is the least "nice" of the 4* hotels that Priceline has to offer, but is still quite OK. Must be a popular time to be in Montreal given the prices I'm seeing!