I'm gravitating more and more to using Walmart.com as a first stop. They seem to be ramping inventory way up, their site--especially search--is a pleasure to use compared to Amazon, and shipping is a minor differentiator, if any.

For books, I always check bookfinder before ordering from Amazon.

But if you get a funky product on Amazon, I would think that returning it would be a fine way of registering disapproval. It can't be that good for Amazon, and you can bet they're noticing both the product and the vendor when it happens.