Looking for iPhone Price Comparison App

[MissMystikle]

I'm looking for an app that I can just type in a barcode and it will give me pricing information from amazon, ebay, etc.

I've tried SaveBenjis, which is the best I've been able to find so far. It was able to get my Pirates of the Caribbean DVD from the barcode but not my nail polish. Anyone use anything similar that works for everything?