Another thing they do is post a wall of stacks with 1c bid and say 50s buy out.
Now, if you try bidding on a bunch of these you will be outbid or have the actions canceled in no time.
Edit:
I found the solution to all my problems:
https://eu.forums.blizzard.com/en/wow/t/ah-need-sort-by-buyout/84151/34
Sort auction by price per unit:
/run SortAuctionItems(“list”, “unitprice”)