In the short time I've been here I learned that some pins just do way better than others. For example, Princesses (especially Ariel), PODMs, some Stitch, some Cheshire Cat, and a few others do way better than others. Tinker Bell for the most part is a prime example of a pin that doesn't do all that well in the Auction House. Also, the lower the LE, the better it does. DSF and DA pins do better. Before I put up an auction, I do a little research. I look at the people who want the pin on PinPics and look for people who are here on the forum to help me determine whether or not it may or may not do well.
Don't take it personal. It isn't you. I just think that for your current auction, DPF members in general aren't looking for Mary Poppins pins. KWIM?