In our bid system for loot we have a rule where the high bidder is charged the least amount it would take to win the item. So if you over bid the 2nd person by a landslide, you are only charged 1 point more than the 2nd highest bid.
When I picked up my Trophy of the Crusades I had a good deal of data to work with. This drops 5 times a raid and its easy to get a feel for the trend of an item when it drops that often and so many people need it. In a bid system, the cost reflects supply and demand. The same people that need the first 2-3 trophies will need the last 4-5 of the night. Except for the people that won already. Many people will not bid on the 1st to see what it goes for.
Here is how the night played out that I picked up 2 in the same run.
I bid 50 on the first drop and it was won for 51 points. This tells everyone that someone bid 50 for it. That first person could have dropped over 9 thousand on it and still would have got it for 51 points. I think about things like this. When the 2nd one dropped, I know someone else knew someone bid 50 for it. People hate to see things go cheap to someone else. They can either bid to win it and give the other person a chance to get it much cheaper later. Leaving them with points they can spend over you on something else.
Or they can under bid you to make you spend the most possible. If someone were to bid 49, then that other person would have to spend the full 50 points to get it. He would get no discount like he would if it was uncontested. Can anyone guess what I bid the 2nd time? Knowing that someone was likely to bid 49 to hold that bid of 50 up, I bid 48 instead.
That item was won for 49 points. They easily could have bid 51 or 50, I have no way to know that. But if he was trying to play a game with my points I was able to dodge it. On the 3rd and 4th drop, I bid 47 points and won it for 41.
By watching and playing with the bids on the first 2 drops, I was able to save 16 or more points. I never bid more than I am willing to spend on an item. So its not the same as bidding 1 under someone else on an item that I don't want. If we catch people doing that we will take action. But dipping my bid a little bit to make someone else pay for it first is fair game. I will get it or someone else will get it. How soon and for how much is still up to me.