Perspective
An argument about money is rarely just about money. One person wants to stay debt-free, or become debt-free as quickly as possible. The other wants to create memories while they're young, even if it means borrowing to do it.
Fear of Regret
Sellers rarely overprice their homes because they are greedy. More often, they are afraid of leaving money on the table, which is why pricing decisions are often more emotional than they first appear.