I haven't followed Gemini market pricing but that one sounds like it needs a lot of TLC. A 10 year old Gemini sold for around $150k new, a new set of sails is at least $8-10k maybe more. (Multihull sails should be heavier, laminated, should be full-batton and therefore more $ than for mono.) The full inside/outside cleanup is worth at least a grand, and that assumes nothing else comes up wrong in the survey.