PC players evidently want an easy way to play their desktop games from the comfort of their couch. Valve’s Steam Controller crashed into gamers’ awaiting shopping carts at 1 p.m. ET / 10 a.m. PT on Monday, and just a few hours later, it’s already listed as “out of stock.” That may bode good tidings for the upcoming Steam Machine , if it inevitably proves worth the price. Valve only sells its controller through Steam. That means that Valve’s near-$100 gamepad has already become a scalper’s paradise. As of May 4, eBay listings of confirmed preorder or presale units are going for upwards of $200 or even as much as $250. We don’t suggest you pay a 100% tax just to get your hands on Valve’s new gamepad. It’s unclear how many devices Valve shipped for its initial run. Based on this initial demand, the Steam Controller may not be out of stock for too long. Valve launched the controller ahead of the upcoming Steam Machine PC/console hybrid.…