I would assume with time we could build these systems, but it's not one of our core strengths. It makes sense to build a relationship with a third party that does have these strengths.

Going with a third party brings a level of integrity to it. The neutrality makes the sellers more comfortable. If I'm hosting the auction, suppliers may not be comfortable that I'm treating everyone fairly. They might think that I'm withholding information from some and giving it to others.