If you can provide truck load quantities, with uniform and consisent cattle, look into Superior Auctions. You should be pleased with the results. Most local sale barns will be similar. The ones with the largest volume on a consistent basis will usually have the best prices. Buyers will show up where they will have the opportunity to fill the greatest amount of orders.
I've read in this post and others about buyers buying at auction a on monday and transporting to auction b on wednesday and reselling the same cattle. This is more rumor than truth. Cattle do not gain weight while at a sale barn, they lose weight. Cattle can be expected to experience a shrinkage of 5 to 10% while going through a sale barn experience. A 700 pound steer purchased on Monday will probably not weigh more than 675 to 680 on Wednesday. It would take about a 3% increase in price just to break even on the shrinkage, plus the sales commission, etc... You get the point.
Most sale barns will be similar within a general localized area. If one were to be consistently higher, then most folks would take their cattle to that sale barn versus's the others.
JMO
Greg