Amazon offers the DeWalt 17-Piece 3/8" Drive Socket Set for $12.59 with free shipping. (Home Depot charges the same via in-store pickup.) That's a buck under our August mention and the lowest price we've seen. (It's the best price today by $6.) It comes in a lockable case.

Update: It's now out of stock at Amazon; however, Home Depot still offers it for $12.59 with in-store pickup.