Particularly if not financing (with resale you have to find it and compare rates to Disney to determine actual value of difference in price), resale is the route for better price. You may have to wait list with Disney if points are not immediately available. Differences are the following which some may or may not consider to be an advantage one way or the other:
1. With resale, price is negotiable as are who pays closing costs. With Disney price is set and you pay closing costs as a new buyer.
2. With resale, you need to understand what you are getting. A resale contract that has all current use year points in it is more valuable than one that has used up all current points and possibly borrowed and used the next use year's points. With Disney you will get current use year points.
3. Resale is subject to Disney's right of first refusal so there is some risk, particularly if Disney considers the sale price to be low, that Disney will exercise ROFR, in which case you get any money put down back and start over looking for a resale.
4. With resale you cannot make reservations until after closing and you have been put into the
DVC system and closing can take a month or longer after the contracts are signed. With Disney you can make your first reservation right after you agree to purchase.
5. With Disney you pay dues pro rated through the end of the calendar year (e.g., buy July 1 and you pay 1/2 of the annual dues) and not until after you have closed and then on a monthly basis if you set up monthly account withdrawal. With resale, and unless you have agreed for the seller to pay them, all dues for the remainder of the calendar year are paid by the buyer at closing.