Didn't get around to taking advantage of Best Buy's new Bieber / Ozzy-promoted Buy Back program before the post-Super Bowl free-for-all period expired on February 12th? Then it looks like you're in luck -- the company's just announced that it's extending the free offer until February 26th. Unlike like the previous promotion that applied to a whole range electronics, however, this latest extension only covers smartphones and tablets, although you can obviously still purchase Buy Back coverage for other devices (a laptop or netbook will run you $69.99). Those that opt for it will be able to sell their devices back to Best Buy for "up to" 50 percent of the original purchase price, which they'll naturally receive in the form of a Best Buy gift card. Better than eBay? Maybe not -- but it's not the worst option to have while it's free.