Can the same REO property get listed on multiple auction sites?

[Matthew Shay]

Newbie here with a few questions: 1) Wondering if its possible for the same REO property to be listed on multiple auction sites at the same time or would not be illegal? 2 ) What determines which sellers (i.e. US bank) work with one auction site over another? 3) Is there a way to distinguish or classify which type of REO properties tend to be listed on the many different auction sites? For example, some auction sites may tend to work with certain states or some auction sites tend to have a lot of Chinese Drywall or mold. Just trying to get a feel about the different auction sites