Send out copies for review. Figure for every 20-30 copies you send out, you'll get 1 review. Pay for an ad with the reviewer to up your odds. Also, make sure to kiss everyone's ass, but do so very cleverly without it being too obvious -- most important is to master the rhetorical style and particularities of the black humor (i.e. the way you degrade women gets really important here). Pay attention to who everyone's talking about on message boards and blogs, and in zines, and make sure to buy everything directly from the artist, and send emails with the order that stroke their ego, but again, cleverly (you're not trying to get laid, just to make sure you have the right 'friends'). Remember to maintain a very strict sense of irony, not glowing praise. It's a delicate matter. Make sure to friend them on Facebook and 'like' and repost everything they post. Do your best to mimic the graphic design of what's been selling out quickly in the last few months. Pay close attention here, because little things matter (i.e. spray-painted versus blank shells on tapes). Most important of all, closely monitor the descriptions of what's popular. They almost never in any way describe the release, but the subjects and objects matter and rapidly change over time: are eels, worms, snakes hot right now, or is it occult sigils and paraphernalia? Become a master of hyperbole and wry wit, and know when to apply which. Master this, and you may be able to sell 40 copies of a C-20 some day.