Time to clear out some inventory, boys! AT&T, starting March 26th, is going to start offering the 8GB and 16GB iPhone 3Gs at a no-commitment price. These prices are $599 and $699 respectively. The good news is that you do not need to perform an activation/unbrick at the point of purchase, so you can buy the devices for your grandma, your best friend, or for half of China before you head back home. There’s a limit of “one per line” which makes us think you’ll need an active AT&T line to purchase an iPhone (AT&T stores typically don’t sell you no-contract phones unless you provide them with an active line of yours), but the presentation also says that they basically have no way of tracking this. Still, at $599 and $699, are these going to move? Time will tell. Hit the jump for some more shots of the presentation we got a hold of!