Monster M1.2s speaker cable: fair price per foot for resale?


Want to post my lengthy Monster M1.2s speaker cable that originally sold for $6.00 per foot. I have several lengthy sections that are 100% warrantied for life to ANY owner. I'm a Insider subscriber and did a Blue Book search and it just reports back "$100.00". What is that value estimate based on? AND / OR your thoughts about a fair price per foot for resale?
dougeyg
BIG THANKS to each of you that responded. I'm "barely" active on these forums, just a guy trying to move some of my past gear. Thanks again!
What length(s) do you have?  Are they factory terminated or bare wire?  A number of years ago this cable was being sold on eBay by the 250’ spool for pretty cheap.  No more spools are around, but plenty of factory pairs for sale as well as bare wire sections.  
I'd never buy a Monster product myself based on their past business practices.
I saw a 6 foot Ethernet cable with the “Monster Cable” name on them at Lowe’s today. That is how far they have fallen. 
"...They no longer Manufacture cables..."

Website updated on 2021 still shows cables. Not sure if they ever manufactured cables but they did sell cables under their brand name. 
Just an FYI, many here, myself included, do not bother with Monster because they litigated against many small mom & pop companies about having the word “Monster” as part of the stores name.  They put most of these companies out of business.  They no longer Manufacture cables and are irrelevant in today’s High End Market.  Personally, I think $100 for the cables are a bit too much.  The only way you will know is to post the ad, start at $100 and if you don’t get any bites, lower the price accordingly.