I write as the part seldom apparent MUST be explained to the owner of property by the Auctioneer hired, contracts are then signed binding both parties. The most freeing method for the Auctioneer is for the seller to sign and step aside from all activity. From the first moment until the check is in hand at the end? I say Ha! Most sellers care too much for their asset to allow such freedom, but some auctioneers say what they must to keep the seller at bay and out of the way. Alarmingly, the risk is then managed in a one sided affair, costs kept to a minimum to the full advantage of the agent charging 10 to 12% with owner paying for extras? Often teams of workers are promised, when only one shows up, advertising promised and only a sign is used and the internet exchange, all efforts going to the "day of". When it works - it's grand, when it doesn't, the Auctioneer is exposed, somewhat liable, and a few -- don't care, get away with the effort, are paid in spite of anything less than best that has occurred.
Lesson to owners - stay involved, demand presence and accountability, repeat what was promised, run your own position to the max and be proud of your ability to do so. Most importantly, pay attention to the timeline and if anything less than the contract and verbal promises begins to occur, remember you have the right to fire the agent - maintain that from the start within the contract! You have the responsibility beyond ownership to know, to watch, to keep the faith. Bring your own GAVEL!