Though you may have less choices resale, there are potential savings. Also, OKW and BW and soon to be VB, HH and WLV can only be bought resale. Once a resort is sold out, you will not be able to buy from
DVC any more. There are limited exceptions when DVC buys back points from resale from time to time.
If you want a resort DVC is currently selling or will soon be selling, you may want to consider buying from DVC directly. That's especially true if you will not be able to go within the next 6-9 months or if you want an exact number of points in a small points package of 190 or less. Just compare the numbers and see what's best for you and your family.