Timesharing Today has a Resale Document Kit, which you can purchase for about $30, or even less if you choose to download the kit. Instructions, fill-in-the-blank forms, sample letters, loan documents, etc. Easy to follow. A kit from My Resort Network sells for under $10, but might not include legal language required if the timeshare or one of the two parties is in Florida.
If you want to be somewhat secure in the closing process after you have negotiated a written deal, consider using one of the low-cost timeshare closing services such as JRA Services or Timeshare Transfer, so that neither the money nor the deed is disbursed until both are in the hands of the closing company. Your buyer might insist on using such a service. Fees are typically $300-$350 depending on what services you utilize. TimeTravel Traders will handle the closing for about $100, but the fee does not include escrow handling of purchase price funds. Or for $119 and a lot of paperwork, if you are comfortable with the details, you can be guided through a self-closing at TurboClose.