I bought the 92126 Harbor Frieght Mini detail gun several months ago and finnally used it today. I looked it up in their current sale flyer and it's 9.99 I forget what I paid, probobly the same. I am very happy with it. I had no trouble with any of the settings and the 4oz cup is more than enough. One thing I really liked was it was a snap to clean. It's well worth the 10 bucks and since we have a store in the area I'm getting a couple more. The price is good till November.
Here's a pic of what I painted and the gun.
The only draw back was the cup lid didn't screw on so I'd give it 8 1/2 out of 10.