I have a question hopefully some of you will be able to help me with.
We are thinking about renting DVC points for our next trip. We have never done so, therefore I am not sure who is reputable and who is not. Do any of you know who to avoid and who are the most reputable people renting their DVC points are?
IMO, this discussion and the topic of "reputable" sellers are not really one in the same.
Just about every owner you deal with will have a "no cancellation" clause written into their contract. That's just common sense because use of the points becomes heavily restricted once they are committed to a rental reservation. Cancellations even on 60 or 90 days notice can leave the owner in a real bind.
Some MIGHT be willing to work with you to re-rent to a third party if you cannot take the trip as planned...but even that is hit-or-miss. DVC villa availability is nothing like hotel rooms so even if you can find a party willing to sub-let the point rental, there may not be rooms available for the desired dates.
Even the more professional point brokers typically have 100% no cancel / no change policies...which was basically done out of necessity. Without naming names, I once asked a point broker about the rigid policy and the response was along these lines (paraphrase): "We get sob stories on a daily basis. Even if we could confirm the exigent circumstances and allowed some form of changes or cancellations, we'd be doing a disservice to our customers who desire a smooth and easy transaction. And we would have to devote a tremendous amount of labor re-renting and re-re-renting the same points over and over again."
Before renting points, you really need to be 99% certain that the trip will happen as planned. And take out travel insurance if you want that extra comfort.
I do have to disagree with OP here that the owner is trying to pull a fast one. He has every obligation to keep the reservation in place regardless of what correspondence has occurred. The owner even offered to alter the reservation if OP found someone to sub-let the reservation. That's more than many others would have offered.