i got wagner 90 power painter. bought it on facebook for £500. only a few months old. i clean it out with water first then just put a bit of thinners through it after. if your going to buy one make sure it has a piston pump and not a diaphram pump as they dont like oil bassed paints im told. herd of someone buy a diaphram one for £2000 and they couldn't do any thing with it