In my mind, I'd never ever pay for an REO listing. Keep applying, keep trying and they'll come eventually. But - never ever pay for them.
No, do not be a sucker. These dopey REO "companies" that promise REO listings for payment are con games and frauds. Stay away. REO is a specialty dominated by a few agents with deep pockets who can handle REO repair, marketing, and maintenance. It is not for the feint of heart or the typical agent looking for easy listings. You can take seminars, and pay companies and do BPOs until you are blue in the face. The vast majority of agents will never get an REO listing from doing a BPO.
The REO market is already winding down, the gravy train has already left the station and the caboose can no longer even be seen down the tracks. Concentrate on normal clients. Every agent and his brother has wasted time trying to get this business, and it is mostly being handled by the same core of REO agents that have been specializing in this niche for the past 20 years.