This reminds me of a story. My parents were selling their house a long time ago, and in comes this guy who makes an offer. As it turns out, he was some kind of expert on negotiating prices, and he new what was the highest theoretical percentage to deduct from the asking price, so it would come across as a serious offer / start of negotiation. So, that was exactly the price he offered, not rounded off, a six-different-figures offer and some cents. My dad still says that was the weirdest selling process he ever went through, but in the end the guy paid a fair price. Most likely not the asking price, since that is also not custom in the housing market.