How much are 6atk WGs worth in Windia?

I've had this pair of wgs for a really loooooooooooong time that my friend gave me, but I dunno how much they're worth? Like I mentioned, they're 6atk. Almost sold them but....I don't wanna get ripped off, and I don't want anybody to overpay o__0 so yeah. please consider though that I need the price for Windia. o-o