Even if everyone's prices were MSRP (which they aren't), why pay ~10% more for an item at a local store who has to pay sales tax when I can just order it and ha

Even if everyone's prices were MSRP (which they aren't), why pay ~10% more for an item at a local store who has to pay sales tax when I can just order it and have it brought to my door for a lower price? A lot of Amazon's growth (and really any internet retailer) was because of inefficiencies they worked out of the merchandising process, but a lot of it was stuff like not paying sales tax if they didn't have a physical presence in the state which gave them an unfair advantage IMO. That benefit is disappearing as state's are starting to realize the damage to their tax base (FL amazingly being one of those even though we've paid Amazon sales tax for a while since they have a large presence here), but the damage has been done already in a lot of areas.