Sorry, I truely have no business telling you to buy it really, because I have never heard one in person. However, I must say that there are very few subwoofers out there that you can buy brand new for $150, and Paradigm is a very respected company. So I'd personally assume it's constructed fairly well. It retails for around $500 new, so if it's in good shape then I'd say it's a good enough deal to try out.

My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD