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
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. 
"...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. 
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.