Have you guys (or people ou know) had any experinces with buying a car online? Bad idea, Good idea? Any experiences?

The thing is when we relocate back to the states early next year, we want to have a Honda Odyssey waiting for us. A 2001 and up would be fine. I was looing on AutoTrader, and there are a few NICE ones on there, and the prices are right too. But should I just relax and wait until I get there to actually see and drive the cars Im interested in?

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Been there...Done that