I have been told by my resort "not to pay upfront" for resale service.

I don't have a Westgate timeshare, but my resort is also packed and popular. My husband sells real estate in Ashville, NC and works for a nationally recognized real estate firm. He has been in contact with his company's office in Central Florida and they directed him to the internet in search of a resale company. The trouble is they all demand some kind of listing or advertising fee! So, we're stuck in this 'circle of confusion' and really don't know what to do...