The general idea is a way to dispose of animals, the format is typically governed by the state as to what kind of testing is done. Generally speaking, you back up to a gate, unload your animals, and they are moved into a numbered pen that is then called a 'lot' when they are ran through the ring. The lot will be announced by the auctioneer so anyone who has gone out back into the yard and seen your animals will know which one's he is selling. No, the salebarn is not just a way to dispose of culls, and you have misunderstood the function of the salebarn completely. While it is a way to dispose of culls, many sale barns also hold special sales that cater to breeding age heifers, goats, sheep, etc, as well as bred cows, goats, sheep, etc. They also hold special sales for weaning age calves, as well as various other livestock. Some heifers/cows are guaranteed bred or open(as the case may be), but usually they are not and then it is the luck of the draw. All sale barns charge fees for yardage, commission, scrapie(for goats/sheep), inspection/health, etc, and they can be either a flat fee or a percentage of the purchase price - yardage, feed, and scrapie tend to be a flat fee per head, while commission tends to be a percantage of the purchase price. If your state tests for Bangs, that tends to be a flat fee per head, too. Preg testing is also usually a flat fee per head. If you are selling you can pick up your check - usually within an hour or two of them going through the ring - at the window in the office marked seller. If you are buying, you need to visit the office prior to the sale to get a number to show the auctioneer. He will record your number any time you're the highest bidder. When you're done buying animals, you visit the office - at the window marked buyer - pay for them, go to the outload(could be called something different in different areas), give the people at the loading chute you're paperwork, they go get your purchased animals, load them, and you take them home. That is the basics of how a salebarn works. I'm sure I probably left something out, but the rest of of the board members will fill it in.