At Best Buy, purchase one used video game and get a second used video game of equal or lesser value for free. (The discount applies automatically in-cart when you add two eligible games.) Individual games are priced as low as 99 cents. Opt for in-store pickup to avoid the $4.99 shipping fee. That beats our February mention (of buy two and get a third free) and is the best deal we've seen on these items over a year.