Seriously man, these things are junk. They are not HD, they are "HD compatible", which means that they can take a HD input. The screen resolution will not be HD. Did you notice that there are no specifications on the website that you linked? If you want to buy something used, find a real brand (optoma, benQ, epson, panasonic, sony) that has some real reviews.
is a hosting site that allows anyone to put up a webpage. That review that you linked is BS. Google around on this projector, and you will see tons of scam warnings.
Let this one go. It is not a good deal. You can do better.