By definition, who is a person that sells or offers to sell his interest in a timeshare?

In the context of timeshare transactions, a developer is a person or entity responsible for creating and selling timeshare interests. They typically construct the properties, establish the timeshare program, and market the available ownership interests to potential buyers. As the primary party involved in selling timeshare interests, the developer is instrumental in designing the product and overseeing its marketing and sales strategies.

While owners, agents, and brokers may be involved in various capacities, their roles differ from that of a developer. Owners hold the timeshare interests, agents act on behalf of another party in the sale process, and brokers facilitate transactions between buyers and sellers but do not generally create the timeshare products themselves. The developer's role is central to the initial sales process, making this choice the most relevant to the question.