Need advice! Not sure the value of cable I have here!

I bought a home with a VERY High end Theater a while back. We decided to renovate and I found the XLR interconnect wires ran were 10 meter XLR cables. They looked and felt kind expensive so I hit the internet to find more info. After some additional investigating I believe I have Stealth Audio PGS-08, as the date lines up with the year of the Speakers (2004 Tannoy Ellipse). I am not sure what to do with these. I want to sell but not sure of the value on the re-seller market. How much gold is in these per 10m length? What can I expect to get for a pair? Condition isnt perfect. They were ran across a basement so there is some discoloration, but they do work well.

Any info/advice would be much appreciated. I plan to sell but do not want to insult anyone with a high price.

Many Thanks!

Greg