Mattfly
Go to SEARCH section of forum, type "Yong Heng" in Air Tanks, Compressor section. Search title and by date, you'll find a mountain of information, including several members with identical questions to yours. I recently purchased a genuine Yong Heng on Ebay and shared the seller used and other particulars. You'll also find great information to help you choose which type of Yong Heng you want to purchase. Saltlake 58 gave some great advice, take that information, add what you find during your search, then come back, if you still have questions. As always, we're willing to help.
WM