In the auction house, if you want to buy an item you like, the most effective method is definitely not to leisurely follow behind others and make bids.
Because usually, auction items start at a very low price, which is actually intended to get more people to participate.
If you think the price isn't expensive anyway and just bid for fun, thinking "It's alright if I get it and okay if I don't," you'd quickly fall into the mindset of, "I'm fine with spending ten, what's two more? I'm fine with twelve, what's two more again?"
If, during this process, you feel like someone is intentionally opposing you, in a moment of impulsiveness, you could easily end up spending a significantly higher price for something you didn't really want to buy.
So, at the auction house.
If you really want to buy something, it's simple, the most effective way is to offer a price that most people couldn't accept right from the start; this ironically makes it easier to purchase the item.