Still stuck with your iPhone 4 or iPhone 4S? Best Buy is kicking off another iPhone trade-in event, but instead of only for one day, the event will run for a whole nine days. Starting today, Best Buy will give you a $150 trade-in credit for your working iPhone 4 or 4S, which is perfect to cover the cost of a brand spankin’ new iPhone 5, after a $50 instant rebate.

Of course, with any great deal there are a few restrictions. You must be eligible for the upgrade, willing to sign a standard two-year wireless contract with Verizon, AT&T or Sprint and be prepared to pay any applicable sales tax and carrier activation fees.

Best Buy told USA Today that the one-day only iPhone trade-in event that was held on June 1 was its biggest day ever for its used electronics trade-in program so it decided to hold another one, but this time extend it to nine days.

The event starts today and will run through June 29, so you’ll have some time to think about it. Just don’t wait too long. Apple has yet to announce the next-generation iPhone, which is expected to launch this fall, so if you’re really wanting the latest and greatest from Apple, you might want to hold off on signing a two-year contract.

Image Credit: 9to5Mac