I have a complete set of drawings and construction details for the ENDURANCE
35 (both strip plank and ferro cement) that I want to sell on eBay but I
can't find a catagory where interested builders might find the ad.

Most every catgory is for model sail boats or magazine plans.

Does anyone have any recommendations..

No, this isn't a shameless advertisement but your welcome to read it as
such. )

Steve
s/v Good Intentions