I think you are going to end up paying roughly the same anywhere you look for an iPOD, unless you go ebay (which I would be wary of, I'm just not trusting enough to make a big purchase like that on ebay). The refurbished idea at the Apple store is a good idea, too.
I got mine at Best Buy about a year ago, but that's only because I live about 10 minutes down the street from a Best Buy in Delaware, where they have no state tax.
you can also try www.pricegrabber.com
. It's pretty much the same thing as bizrate, but they may have some different locations listed.