It happens all the time with the auction houses. Buyer wins card from auction house A, consigns it shortly there after to auction house B. New Buyer wins it, consigns it to auction house C, etc,... It's no big deal. All the buyers from all the auction houses know each other. They talk/discuss/ have a beer about it when they see each other at the National.
It's the same thing on B/S/T, just with fewer zeroes for the prices
