The quality of artwork is going way down. Where? On the fake drawings that people try to sell on eBay these days. Some of the forgers used to show real talent as they traced a drawing by Al Williamson or Charles Schulz or Bill Watterson, signed the guy's name to it and offered it for sale as real. There are still a few good ones that could almost fool an expert but some of these…geez. Really awful.
Amazingly, some of the worst ones come from Certificates of Authenticity. As I understand it, the premise behind the Certificate of Authenticity is that while a forger might possibly be able to forge a Frank Frazetta drawing, he couldn't possibly forge a Certificate of Authenticity. Some frauds take the easy way out and just give you a Certificate of Authenticity they make up that doesn't have any sort of expert or recognized authority behind it.
And amazingly, sometimes organizations that have some credibility have someone on their staff who doesn't know what a real Steve Ditko drawing looks like. There are bogus drawings with real Certificates of Authenticity attached. Just the other day on eBay, someone paid several hundred dollars for a properly-certified fake that shouldn't have fooled Quincy Magoo, let alone a self-proclaimed expert.
I do not get involved in certifying drawings or signatures. There's nothing in it for me except annoyance because some people get really, really angry when you tell them that their Guaranteed Authentic Jack Kirby Drawing for which they paid megabucks is not by Jack Kirby…or at least, not by that Jack Kirby. More than once, I've been accused of being in cahoots with some guy I never heard of to work some sort of scam that makes no sense at all. So I won't give you my opinion of a given drawing but I will warn you: There are fakes aplenty out there. Be real wary.
You should stick with drawings and autographs like the one above in a Peanuts book which is current being offered on eBay. In fact, this one is probably very collectible. There aren't many autographs out there which Charles Schulz did in someone else's handwriting. And what makes it even more valuable is that he somehow managed to misspell his own name.