I have points banked with Fiesta American/RCI

Can those points be sold and transferred to another?

Once you bank anything with rci you can not sell the points to anyone unless you are selling the underlying ownership week and transferring the rci membership with the already banked points to the new owner.

Do I bank points with Redweek? or, Only post availablity for resale? I have floating FAV Master points that can be used at any FAV resort