Like most things in the US, it varies wildly by location. In Seattle, there's a 0.50% real estate excise tax that the seller pays (theoretically it doesn't matter if the seller or buyer pays it, but practically speaking it's better for the seller to pay since they're the ones with cash in hand.) I'm fairly certain that WA can't have graduated rates because our state constitution prohibits anything but a flat rate for nearly all taxes.

The list of all of the rates for WA: https://dor.wa.gov/sites/default/files/2022-05/84%200013_Jul...