Yea, there are a bunch of factors that can contribute to an auction not doing well comparatively. Pictures/scans, grade (sometimes listing the grade helps, sometimes not listing a grade and letting people determine on their own is better), do you have other things for sale (if I want to buy something I often look at what I can "bundle" to defer shipping costs over multiple books), how much are you charging for shipping and what service are you using, how much feedback do you have, bidding wars, etc...