I don't know if I would trust a website to buy a gun. I imagine trying to return it for a problem would be a major hassle. It would probably be easier to buy it from a store. Also you wouldn't have to pay a transfer fee if you bought it in a store.
Don't know much about Taurus. I searched for Kahr PM9, because I am considering it. The prices online seem to be about what I would pay in a local store anyway. So I don't know if that website is really significantly cheaper or not.