Yeah! Fair point there, I also think valuing based on extra art might be easy to manipulate as well (i.e. you might see people like, intentionally adding art to their gallery to eventually exchange for rare traits or something?) I'm not sure, but yeah!

Maybe you can also appraise designs for folks based on how hard or easy you think they will be to upgrade, and make an initial offer (i.e. "I'll give you a Common + 2SR for this design) and then leave it up to the person to accept or decline? Idk. I'm glad you like the idea though! I think it would make the turn in a little more exciting, and you might see different types of designs turned in than in past events if there's added incentive for it.