He should follow the link in Denise's first post to get advice on how to establish an asking price, where to offer it for sale, how to avoid scams, etc. And he can ask questions here on issues that aren't clear or that are not addressed by that "how to sell" article.
It has been TUG BBS policy for many years that someone seeking to sell a week should not specify the details of the week here without risking that the info will deleted. If we didn't have such a policy, every seller, in addition to placing ads here and elsewhere, could advertise on these forums by simply saying "I am seeking to sell an oceanfront week 28 at Smooth Sailing Resort and need help in how to go about it." We treat such posts as unallowable ads and edit out the details.