if your not busy on sunday 15th october bring the cards to the collectors fair at panthers.there are a few rugby league dealers there who might be interested in buying them.
That's a St George set you've linked too and your asking about a Western Suburbs set sometimes the price will differ with the different teams and I can tell you for a fact those St George collectors are fools.
You mentioned unsealed does that mean your set is sealed?
They (St George) were fetching $350+ a few years ago but the market has certainly softened.
Most teams were for sale on eBay a few months ago and as Ross said , varied in price depending on team . I'm sure the Sharks one went for $180 sealed ?? If that gives you a guide??