That is a Wild Cat from Victor-Models:
http://www.allradiosailboats.com/design/wildCat
The manufacturer (
https://victor-model.com/) ceased operations some time ago, so you won't get help from them.
I suggest you post your question here (very active forum!):
https://www.rcgroups.com/sailboats-59/
Just ask if someone is interested in the kit, then privately agree on a price - shipping may be an issue as always.
I am the admin on
www.allRadioSailboats.com, and I am interested in providing materials to the RC sailing community. Do you happen to have plans/instructions as part of your kit? I would love to publish them for everyone to find. Can you please provide scans of all the materials?