I just came from the local blue borg, they have a set of Campbel Hausfeld gravity feed sprayers. One is a full size, the other is the touch up model, both have pressure regulators, and cleaning tools all together in a kit.
Reg $90, clearence for $48.
They may not be for a pro, but I bet they work fine for spraying poly, shellac etc.
Just passing this along.
Dave