I've tried Amazon for groceries on this line of thinking. Verdict: it's terrible. Their groceries are priced uncompetitively and after a few times having some stranger pick my produce (and doing an offensively bad job of it) I don't do that anymore.

So since I'm 100% definitely going to the grocery store for produce, at minimum, this whole concept fails. May as well pick up the ziploc bags and paper towels as well while I'm there.