Well Google Adwords for UK gives :
"sportswear" - 8100 monthly searches
"sports wear" - 3600 monthly searches
and all kind of sports wear combos - men, women, child, cheap etc,
while:
"sportwear" and "sport wear" - Uk search show around 200 monthly searches
That said it proves the exact match of the domain is the perfect UK used word, about the hyphen, well it does lower a bit the exact match power- maybe with 20% not more.
I was thinking about branding and really any Sports wear manifacture can use this domain as main selling or presentation point for its business.
Having above said I still have no clue what price to set for this domain, I was thinking for something in the range 2-3K USD - ofc I'm fairly new to the domain flipping so if I'm mistaken a lot please feel free to correct me, this is why this forum is about.