Typical cost of Radiator re-coring

I just paid almost $400 to have mine converted from a two-core to a three-core, but they moved the port on the bottom so I could use the later model aluminum water pump. Pressure tested, painted, warranted. It was a bit to drop, but cheaper than trying to find a new one and I wanted to keep the bay stock looking while keeping one less rotting piece of junk laying around my garage.