My estimate is mid four figures. Maybe low five figures to the right enduser.
It could be set up as a store for gear, events site or 'how to' videos site.
I feel snowboards.com.au is the top domain in this category since a retail eCommerece site would prefer using that. snowboarding.com.au is still a solid name in its own right. The market itself for just snowboarding is a bit limited here in Australia though (I use to sell snowboards many moons ago).