The used video game mar­ket is on the verge of becom­ing down­right crazy! This 2 bil­lion dol­lar a year busi­ness (which is dom­i­nated by Game Stop and eBay) has Ama­zon and Best Buy foam­ing at the mouth to grab a piece of the action. More com­pe­ti­tion between retail­ers breeds bet­ter deals for con­sumers. You’re prob­a­bly...