A friend of mine restores these old pumps, some are worth a fortune. I know he bought one almost like that one 2 weeks ago, in not near as good of shape, for 200.00. Do not remove the parts inside if you decide to sell it someday the new owner will pay more for a complete pump. Photograph it the way it is now. If you plan on keeping it paint it how you want it, but save the picture in case you someday sell it. If you plan on selling it, restore it the way it is as original.