I'd recommend the Cerious Technologies Graphene speaker cable. You might find one used, but it might have been purchased already.
I think an 8' pair go for $649 new and in my opinion well worth the cost. A huge bang for the buck. If you have not seen it, here is an Audiogon forum regarding the products:
https://forum.audiogon.com/discussions/cerious-technologies-new-graphene-cables
I think an 8' pair go for $649 new and in my opinion well worth the cost. A huge bang for the buck. If you have not seen it, here is an Audiogon forum regarding the products:
https://forum.audiogon.com/discussions/cerious-technologies-new-graphene-cables