I'm pretty sure hes legit, hes been around for a while although I've never personally dealt with him. It makes sense he'd give you a much better deal vs on ebay and zelle would be a common way to pay for something like that. Like how else would you pay him? Hes obviously trying to cut out as many fees and taxes as possible. Still your concern is not unfounded and tbh I have never seen him have a good deal on anything lol