SCOOBY-DOO: Going for big money on eBay!

I did a Scooby comic cover a long time ago with Daphne as a "Elvira, Mistress of the Dark" homage and it's going for big money on eBay! These are "raw" copies going for that price! Not even slabbed by CGC. I sold the original artwork a long time ago to a Scooby collector. I got my normal asking price but wonder what that artwork would go for now? Hindsight sucks sometimes. Who knew?! I have three…