If you invest your time and money to go for it, the highest value of all will be sentimental. Only you will be able to appreciate all the details that went into creating that great sound.
Having been there and done that, if it's money you are after, don't do a darn thing to it including clean it, and just sell it. If you derive personal satisfaction from tinkering, and want to learn a thing or two about drum making by all means just do it. The truth is that drum is not rare, it doesn't need to be preserved like high art for three hundred years. Ludwig made zillions of them even though you don't see them every day. My advice is to put a new head on it and wear it out working on your chops. The pleasure you will get from playing a fine drum such as that will be worth far more than $300.00 in the long run.
Glen