I don’t think any will disagree that no two houses are exactly the same. However, I have a question, for you, how would you prioritize which is feature should add more to the home and is that the same as what the seller is thinking? The reason I ask is, lets say two houses is a few house from each other with the same floor plan, so it remove the variable of lot size, house size, and direction the house is facing. Then there are things at sets it apart, one has a pool and granite counter top while the other have hard wood floor, stainless steel appliances and brand new carpet. Which one would you like more and be willing to pay more? I’m almost certain that no house less than a custom home built for you have everything you want.
However, back to the original topic. I don’t see why it’s so wrong for trying to get the best price you can get. To my experience of buying things, you always get lower price when you pit seller together. So, why can’t you do the same for houses?