I suppose it depends how long you have it. The more it is used by you, the less it will be "newly restored" for the next buyer. I've owned a couple, and I wouldn't get one with the expectation that I'll get my money back out. You buy at that level to enjoy it yourself. In most cases, expect to take a hit when it comes time to sell.

There are so many variables that I wouldn't want to generalize. Pins go in and out of fashion, among other things.

I know I have more money in my freshly restored Tales of the Arabian Nights than I could hope to get back out of it--that is, unless I sold it immediately, which I have no intention of doing. Putting a lot of money into fixing up something old is rarely a good bet financially (unless, of course, you got an exceptionally good deal on the item in the first place).