This is the amazing 6X power line filter from Blue Circle. You probably already know all about it. :) I'm moving to Australia so I can't keep it. It is in excellent condition with only minor scuffs that can only be seen under close inspection. It works perfectly.
This also includes an Audioprism Quietline MKIII power line filter. It is in perfect condition and works perfectly. I had 7 6X filters at one time, and using a single Quietline filter in addition was still beneficial for some high frequency noise. The Quietline seems to filter over a different frequency.
SHIPPING IS FREE within the US via 2-3 day Priority Mail. I can ship to Canada for an additional $10. No extra charge for PayPal.