Image: CNBC (screenshot) GameStop, a meme stock valued at $10bn, made an offer to buy online retailer eBay, valued at $50bn. The game company hardly seems in good health as it is, and that was before GameStop CEO Ryan Cohen gave a bizarre interview in his Jensen Huang dad jacket, which led to speculation that he was intoxicated , has suffered brain damage , is a stupid weirdo , or playing multidimensional chess . After very careful consideration, eBay has declined the generous offer. "We have concluded that your proposal is neither credible nor attractive," eBay's chairman, Paul Pressler, wrote in a letter to Cohen, before outlining six factors influencing the decision.…