I have a EC Denco fly rod from the 1960s, 8 1/2' for a 7 wt (HCH in those days). I paid $9 for it. I don't think it has any significant resale value at all. A never used one might be worth more to a collector, but I doubt it would be more than $20 or $30.

Sincerely,

Salmo g.