I'm curious, why? Are you thinking of buying just a REO? As Erica and the other agents stated, any full time professional who has been in the business for any length of time, has experience with REO property.
Unless you are a bank, it doesn't matter if you are a seller because it would not be applicable to you. REO means Real Estate Owned, where the bank has foreclosed and taken the property back. There are many phases of properties in distressed, from Short Sales, REO, to Foreclosures on the Court Steps.
Something else to understand, is that Short Sales and REO and some other transactions require Buyers and Sellers to sign affidavits that there are no non disclosed earnings (exchange of money out side of what is on the HUD final closing statement). Commissions are negotiable and some agents offer rebates to gain clients. Should you chose such an agent, make sure you understand which properties are not applicable to receiving a rebate.
It is always advisable to have a planning session with the agents, so that you can learn more about how the process works, understand how the agent works, and see if there is a fit between you and the agent.
I raised my sons in Cambrian, in 95118. When you are serious about your real estate options, I invite you to contact me for a no hassle consultation at my office. Where you can have a face to face conversation and learn so much more.
In the mean time, have an amazing day!