No. The fact that it's in what appears to be a garage full of other mopeds means the seller probably got it for 50 bucks and is trying to flip it to you for a nice profit, There is nothing really wrong with that, since this stuff is worth whatever you are willing to pay, but if I can find at least one or two running mopeds every month for ~150 a pop, so can you. Ask hick friends about dirty old peds in their uncles barns, check Craigslist daily, just let it be known you are looking for one, and one will come along for less.
On the other hand, if you really want one right now, and the money isn't that big of an issue for you, a Free Spirit is a great place to start, and that one certainly looks like it would be a nice bike if you are comfortable with digging into the engine. Mopeds are ridiculously simple machines relative to just about every other form of transportation on earth... but if you have never turned a wrench before, buying one that needs fairly involved work like you say this one does could be intimidating.