Also, it's a large chunk of steel. So even if it is cheap, you're better off with slightly less steel on a Downtube for the same price (try Ebay). If you are at all serious about biking, there is no free lunch. I would consider spending some money for a decent bike.
More importantly, if it's just a novelty item, you've got no concerns. But if you are actually going to fold it, ask whether you are going to put it in your largish car/fly with it (Downtube, Swift, Friday) or need something that's smaller (Dahon/Downtube Mini or Birdy/Brompton).
Each of these is ordered by ascending price.