Metal Gear Solid 4 Headphones

Sony is really going all out to promote Metal Gear Solid 4 for the PS3, as that is one heavy hitter for the Sony console. This time, Sony will be offering the 7.1 channel MDR-DS7000s headphones which feature different MGS4 artwork on each can. These will be extremely rare since only 30 will be randomly handed out to lucky customers of the MGS4 bundles from the Japanese Konami store from now until 1st June. What are the odds of picking one up? Best save a stash and look out for one of these on eBay.