Bill is correct do not refinish (or restore) it as you won't get your money out of it, it will be a refinished Parker, clean and oil yours up, if you can post some pictures here hard to even tell you what to or not to do to the gun.
And again beware of those "gunners" they smell a quick buck at your expense
Any small bore Parker with decent bores and tight on action is worth more then they are implying. Stay away from guys like that.