I got burned early on, with a 12-string guitar that might have worked as a harp if the neck had been just a bit more bowed. As it was, I sold it on to someone in Canada, and, despite full disclosure of the problems, adverse currency and hefty shipping cost, got my money back.
If it wasn't for eBay and forums, I don't know where I would buy basses. The last time I went into the dingy cellar where the local guitar shop keeps their bass stock, I felt depressed for a week.