I bought a very large collection from an estate where the great majority were autographed books. However, I am finding out that he bought quite a few of them off ebay. Most are genuine, but I have already pulled out about 5 that I found questionable.
Feel free to post the other ones too :) Its interesting to see when people find treasures (if a great majority is real) at estates, rummages, 2nd hand shops etc.