I've seen other people auction off pictures of random things before although my favorite auction was the one where the guy was auctioning off "Nothing" - he was just looking for donated credits! I do believe he ended up with several hundred if not just over a 1,000 credits! It pays to have an imagination! I hope your pretty potato picture earns you lots of credits! (✿◠‿◠)
I think the rock auction was a little better where you can at least use that as a paper weight or add to your garden. But at least this tops just one piece of paper. It makes my day to see the things people list on here and have to check to see if a bid is on it. Gives hope to all of us who hasn't tried listing. Go for it and get it!