jimy james: It depends on how much you value an autograph by Dave Weckl. I think though that the number of people wanting to pay lots of money for an Impulse crash is kinda small.
I have a 16" A pre-serial Thin Crash autographed by Steve Gadd. But the autograph is not the reason I think it's priceless. I doubt anyone would buy it for much. I hardly ever clean it, so it looks like crap. Its slightly bent, and got a small nick from having fallen off the riser. Its "just" an A, and there are probably lots of cymbals of the same type and from the same period around. But A's all sound different. When I bought it, I sampled half a dozen of them in the store. This one was very unique. It sounded like heaven on earth to me then, and it still does now. It has provenance too, most of my cymbals having been used in a number of hit recordings by friends. But I love it to bits. Its priceless to me, and I wouldn't dream of selling it.