60$ is reasonable compared to some of the upgrade kits out there. i don't have ceramic bearings but i will say when i went to some cup and cone record hubs the difference was unbelievable compared to other wheels i've had. they feel like they could roll forever when i coast on the flats. when another friend tried them his first and only comment was how ridiculously smooth the hubs felt.
i have no idea how much ceramic bearings cut down hub drag, but if i could make the average cartridge bearing hub feel like some campy records i wouldn't think twice(for that price).