It's not discontinued, the acoustic was poorly assembled in india/korea/china out of shoddy materials and marketed at a ludicrously inflated price to people as a 'starter pack' to get people who don't know any better to spend 500% more on the thing than it cost to build. There's no need to put a serial number on it (although there likely is one in an obscure location, or it's lost if you somehow lost the tag inside the instrument) because it has virtually no value - there are millions of copies floating around for dirt cheap. You'd be lucky to get half its retail value in any pawnshop, regardless of condition, and even that is hardly worth paying for it as an investment.