My gut tells me you may be right, but the particular city I live in was one of the least affected by the last bubble and is projected to have a steady (and substantial) increase in population for the foreseeable future. Prices have been on a moon rocket for the past several years as it is, so unless you're completely right it's now or never. Plus I'm looking in the range of "flaming turd" where there's less markup, I'll put my own labor in to make it nice rather than paying someone else a premium for having done so.
If you're cool with rehabbing, the best time to buy is after the foreclosures. I saved a buddy $200k in 2007; got his ass out three months before the collapse. His former development is a ghost town now. There are people predicting the imminent collapse of the market and apocalyptic corrections but I think it's safer to say we're looking at a mild bear market which, if nothing else, will slow the "moon rocket" towards its apex. The longer you wait, the more downpayment you have, the less PMI, the better your financing, etc etc etc.