I have an HGS-15 that is 3 years old and in perfect condition. However, I am moving into a really small place and that sub just won't sound as good in a small area. I am looking to sell it but need some input on the resale value of the beast. It retails for $2,500. What I really want to do is trade is straight across for an HGS-12 or 10 if anyone knows of anyone that would like to do that. Thanks