That's true. I buy tons of Amazon stuff. Sometimes because it's cheaper. But most of the time because it's more convenient (even when it's more expensive). I factor in wasted time/gas/energy to go to the store and Amazon wins out almost all the time.
Exactly. I think the only thing I buy from Amazon based purely on the sales tax benefit is video games, which are the same price both online and off. Everything else is because of convenience and selection.