I paid £450 for a ROA recently, SS with Target sights. Do touch anything that is Not Stainless steel as it rusts & is a nightmare to clean.Look at the screws in the side. If they have been butchered by use of a wrong sized screwdriver, not good. If the cylinder has been damaged by fanning and nipples by dry firing, not good, If the cylinder moves alot on the center pin, not good. Otherwise they are going up in value & are fun to shoot. My prefers ball and 21 grains Swiss No 3