It would probably approach 300 if you bought all new fans, wiring, connectors, the controller, and fuse. If you got the fan at the junkyard like I did, it's probably right around $200.
It's worlds different than the cheap fans you can buy...and has a great controller.
Naturally you can use coolant switches to turn on the relays and some more creative wiring and not buy the controller and save that cost.