I can't comment to the point of renting as I have never been the one renting out, but there are always people looking to rent points. The only time when you might have trouble renting your points at WDW would be between Oct - Dec.
Don't count out VGC. I have been tracking what is available at the 7 months mark. Granted I only started this month, but i have been very surprised that there is availability, usually of the 1 or 2 BR units and occasionally the studios. they are high point rooms, but you might be able to score a 1BR at the 7 month mark. I am sure VGC has its busier time, just not sure when that is.