In defense of the cheaper airbrushes, I've used this one for 2 years. I paid $12 for it at Harbor Freight Tools and it has served me well. For the price, it has a very precise needle, very fluid dual control, and is easy to clean. I use it to paint fishing lures and have never had a problem with it.
These lures are pretty small, so the brush I use has to be pretty good.
