…Or just sign a 2 year contract, which, if you’re in the market for a new cellie anyway, is not a bad deal at all. (An 8GB iPhone 3GS is normally $99!) The sale will take place this Friday, the 10th, at Best Buy stores nationwide. It’s an instant rebate, so you won’t even have to scrap together cash or wait around for a mail-in rebate. The promotion applies to new and additional lines, as well as qualified upgrades.