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I saw another good deal at bunnings Nerang, $20 for a spray gun, I think it's older stock as the XU1 brand has the XSG-200 on their site which is 80W, but for $20 it's a good deal! (I dont know the original price, but havent seen a spray gun that cheap!)
Have you used it yet?
I picked up a cheapy electric Arlec spray gun years ago for some small painting jobs around home. Still end up pulling out the compressor and air spray gun as I could never get it to work correctly. Had to thin the paint so much to get even spray pattern and it ended up useless for any vertical surfaces as the paint was sooooo thin and would just run.