Sears has Craftsman 6-Drawer Quiet Glide Roll-Away storage (Midnight Blue) for $160 - 10% off auto in cart - $5 coupon SWELCOME10248 = $139. Choose in-store pickup to save on shipping, otherwise it's $65
I have a Snap On almost exactly like that one. I have a Craftsman 3 drawer top box on that and the Craftsman boxes are excellent and that is a very good price.
I have an old Craftsman similar to that, use to be the main bottom box, now I use it for wood tools, and as a movable island to work on (I have 7 gage cut to fit the top).