Very few appellate attorneys will work on contingency:1) Appeals are far from certain, because appellate courts, more often than not, will not overturn the ruling of the court below. As a result, there is a less than 50-50 chance of winning (and getting paid).2) Even if the appeal "wins," many successful appeals do not result in the appellant winning the case--instead, the appellate court will often "remand" the case, or send it back for a new trial or hearing with certain errors or mistakes corrected. Therefore, even if the appellate attorney wins his/her appeal, that may not be the end of it; instead, the case may be retried, and so there's still a chance for the case to lose and the attorney to not be paid.Therefore, because there is a significant chance of not winning and being paid, most appellate attorneys will not take cases on contingency.