I went to about 20 auctions and bought 3 around 2012-2015

Used to get cashier checks in 100k, 5k, 2k, 1k etc. There was a full time lady and I think she has fund from a few investors. She bought most of them. 

For Two of them I wond, I added a $ to asking price. 

For one I bought for a friend. I had to bid ~15 times. Quite nervous.