Best used sub for $300 and $600?


I 'd like 2 suggestions please:
1. What would be the best used sub for $300?
2. And the best used sub for $600?
chelentano
I would look into a new SVS PB1-ISD for $599. I just replaced a REL Q201e with one and it blows the REL away IMO.

www.svsubwoofers.com
Take 500.00 go to Acoustic-visions.com , order an Adire Tumult.I now own two.You only need one.You have NEVER heard or felt anything like em.I have owned them all.This was suppose to be a hobby sub to have fun with.I never thought it would surpass the big 18" servo's.Good luck
IMHO,

Under $300 - Paradigm PDR-10
Under $600 - REL Q's or HSU VTF-2 ($500 new)

Under $600 REL's (lower end Q series or older strata's) are very rare. But if you can find one, definitely get it.