How much is this worth?

I have a complete set of 1990-1991 Upper Deck hockey cards and was wondering how much the whole set is worth? I've looked around on price guide web sites, but to no avail. So does anyone know a lot about cards and/or how much this set is worth? There are some pretty good rookie cards in it, like Gretzky, Belfour, Yzerman, Roenick, Jagr, Sundin, etc... Any help would be appreciated! Thanks.