I would ask verification for the exact ownership before I pay any money to seller. If resort system has a website with owner's account, you can ask the copy of ownership page. For Starwood, they have "what I own" page and "amount due" page, so you can ask copies of both pages to see unit number (on deed), ownership type and if MF are current. Marriott, Hilton and Worldmark has the same feature.
If you are not getting TS for cheap, using escrow is recommended. When I used JRA Services, closing cost which includes escrow service was $275 + recording fee.