@ the OP; If it were me I think I'd steer away from buying something like that on Amazon. That's because there is always the possibility that something might go wrong with the electrical system and then it might have to be fixed. Those bikes look like they are built with a bunch of cheap Chinese components. Remember the golden rule; "You get what you pay for". I think you'd be better finding a LBS that sells affordable ebikes and buying from them. Then if something goes wrong they should be able to service what they sell.