We just won this signature at a goodwill auction, I haven't paid for it yet, but I was wondering if it looks legitimate. I found a few reprints of his signatures that look similar, but am not 100% certain.
This is a fake. Also, comparing it to other obvious fakes — not reprints — on Etsy (a hive of fake autographs) is not a sound method of authenticating anything.
Best to keep your Blankety Blank chequebook and pen in your pocket on this one.