Lower seals in yammy 225

Anybody have a rough idea of what it costs to have the seals replaced in the foot of a 225 yamaha 4 stroke? The motors were “vacuum and pressure tested good” but during towing operations it seems to have developed a leak. It’s leaking out of the center of the prop and down the skeg. I dont mind taking it to a dealer, but that sometimes varies wildly in price between dealers. What’s an “average price?”. Thanks!!!