A lot depends on your use year. For instance we have a February year. That means if I was trying to rent, the reservation would have to be before Jan 31st. That SEEMS like plenty of time, but it's really not. From about the first of October thru the first week in January, DVC books up quite full with waiting lists. Starting with the Food & Wine Fest, moving to Thanksgiving Week, followed by the early weeks in December (THE most popular time for DVC reservations), then the Christmas holidays, ending with the Marathon, DVC rooms book early and completely. So, renting points the last quarter of the year can be a huge hassle. You may have points, but if there are no rooms available it doesn't do you any good.
Most of the successful rentals that time of year are of already confirmed reservations that the member wasn't able to use for one reason or another. Even then, it's a hassle to coordinate renters with the exact days of the reservation as it can't be changed.