Went to a few showsteers' sales that worked like this, once you understand the concept it is easy to follow.
Steers listed in order of sale
Each steers had a base price, if you where the only one to put a bid on him he was your for the base price
Then every time someone put their name on a steer the price went up a 50 dollars unless the last person put a higher bid in, (if the steer was at 1200 they could go to 1250 or higher) But you only had to put one bid on the animal to be included on the bid off.
At a arranged time they would close the bids on the first steer, from there they would close the open bidding on a steer every 5 minutes or after the previous animal sold which ever was longer, at this time only buyers with their name on the list could bid, starting with the lowest bidder.
They could bid 50 more than the highest bidder on the list, if they chose not to they were out and it went to the next bidder.
This went on until there was only one bidder left, if nobody upped the bid the last person to put an original bid on the animal was the owner.
If you had placed multiple bids on animals you could back out of the others once you purchased one, but since they closed at intervals you just needed to get on one early and you could fall back to a bull who was still taking open for bids.
What most did is find the steer they were interested in that sold the earliest in the sale and get on that one, but have a list of other steers you were also interested in so you could bid on them if you missed out on your first, some times the first one was not your favorite but it got you started in the process.