I would do a Google search, search Trulia or even look on Active Rain first. Interview a couple, verify what they tell you and then decide. Since the foreclosure - REO market is strong and...getting stronger, many agents, trying to get into the game, claim to be experts yet, have never been involved in an REO transaction.
Inspect what you expect. Selling 1 REO or Short sale property transaction does not an "expert" make.