Hi and welcome to TUG!
If someone asks you for an upfront fee
(marketing fee) to sell your timeshare, that is a huge red flag!
Reputable brokers charge their fee out of the sale of the timeshare - after they sell the timeshare.
Anyone who charges you upfront, is just in it for the upfront fee, and they don't care if your timeshare sells or not.
Unfortunately, most timeshares are only worth 0-5% of the original retail price. In that case, it is better to sell it or give it away yourself, because the broker's fee is going to be more than you sell your timeshare for.
Reputable brokers charge $1,000 or more to sell your timeshare, but if your timeshare sells for less than $1,000 - you pay it out of pocket. In most cases, a broker will not accept your listing for a timeshare that will not sell for more than $1,000, because it's not worth their time and effort.
How to give your timeshare away on TUG:
need an exchange for 2016
I'm not sure exactly what you are asking, but you can advertise your timeshare for sale or for exchange in the TUG Marketplace, which is linked in the red bar at the top of the page.
Or you can use an exchange company like RCI or Interval International, or one of the many independents.