Yeah, man....always nice to find something like that.
As far as value...not much. It isn't a matched set and the bass drum has been altered in a major way. The finish is cool, but not super-desirable among Ludwig collectors. I mean....it's better to just use it as a player. The drums probably could be made to sound good -depending on the condition of the bearing edges.
You won't get much for them on the market, though. But since they aren't matched, anyway, if you really wanted to sell them, I would advise you to separate them and sell them individually -you might snag a buyer who is looking for that one drum to complete an otherwise incomplete kit.
If they have sentimental value, then you could always make them a restoration project.
-my take, anyway!