I managed six correct out of seven with mostly a heuristic of: if it looks "bad" (e.g. "childlike", "messy" or "plain") it's probably expensive. The one I got

I managed six correct out of seven with mostly a heuristic of: if it looks "bad" (e.g. "childlike", "messy" or "plain") it's probably expensive. The one I got wrong was the lemon/quince one which I found too close to call. How did other people fare and on what basis did you make your choices?