A while back, I posted a nice coupon for the mechanic's cart. I finally used mine to get the blue 5 drawer model. I also had a coupon for the add on side tray that should have been included in the first place. The tool cart coupon runs out on 12/31 while the side tray coupon runs out on 12/24. If you are looking for a particular color, call the store before heading out. They seem to get random colors on each new shipment.
For future reference anytime you want a coupon just visit Harbor Freight Coupon Database. Even the employees at my local store use it to help customers.
I bought the 4-drawer cart for $119 and it's a good piece for the price. Last years black Friday deal was $99. Coupon is now $139.