To answer the title question? Hell no.
I love original art, but it just gets silly past a certain price level. Same for comic books. Even if I had the money, I wouldn't pay going prices for top-grade books, I don't think. (Tough to know for sure, not having that kind of scratch...)
Granted, ask me this same question about a Ditko page from issue #2 of Amazing Spidey, and I might take longer getting to the "no".