REO's - the cost of doing business...

I am curious to get some input on the costs of carrying REO listings including what portion of the costs are typically covered by the individual broker versus the company.

I am currently have a few relationships in Southern Oregon with banks to sale their REO's and it seems that all the banks or servicing companies have their own procedure for handling the up front costs to the broker/company that comes along with the REO business.

If anyone has some experiences they would like to share it would be appreciated.