You are lucky DVC even has any resale value. Of all the timeshares right now I would say only DVC and Hilton (both because of ROFR) have held up very well. Certain Marriott weeks are still worth a good price but the vast majority are near worthless.
With that said, I used the Timeshare Store and did well a few years ago. I think I sold my points about 3 years ago and sure I lost about 1k or even 2k over what I paid for the points 7 years ago, but I still cleared a lot of money, even minus the small commission price. I would strongly suggest using the Timeshare Store over anyone else. I had my points listed with three companies at the same time and Timeshare Store was the only one who found buyers for me. I think I had two offers, maybe three. I foolishly passed on the second offer I got, only to settle for the same exact offer a few months later.
If selling your points is a priority, then you will have good luck by pricing your points as the cheapest for whatever resort you own at. This strategy worked very well for me. I didn't bother with pricing my points at what everyone else was pricing them with. I made my points $5 cheaper than the lowest comparable contract and that worked like a charm. Sure, you loose a few hundred dollars, but the alternative is that you will miss the opportunity to sell and loose thousands of dollars a couple years from now.
One thing to note, all of the DVC resellers have a clause in the contract that if they find a buyer willing to pay your asking price, the contract is sold -- you do not have the opportunity to reject the offer, if the offer exactly meets your terms. This is not really a big deal, unless you think there might be some kind of bidding war for your points (which there will not be), but...
If the thought of maybe selling your points cheaper than anyone else is makes you a little uncomfortable, another strategy is to list your points cheaper with one resale company (i.e. timeshare store) and for a little higher with another resale company (i.e. fidelity or someone else). Just be careful to cancel your listing with whatever other resale companies you may be using, if your points sell with someon else.
I also would not use redweek or any other by owner website. Most of those by owner websites are meant for Marriotts and other traditional timeshare weeks, not so much for DVC. Also, just look at Redweek or any of the other websites, those prices are yesterday prices and most of those listings never sell.
Good luck selling. My experience was mostly good a few years ago. It took a few months for my points to sell back then. Not sure how things are, today.
...wanted to add that I actually sold my DVC points the weak before I was going to Old Key West during the last usage of my DVC points. Since I was already in Orlando for the week, I stopped by The Timeshare Store, personally and did all the closing in person. It is a small business, despite the large number of DVC contracts. It's in a fairly ordinary, if not slightly run down shopping plaza almost directly across from Sea World, if I rember right. There is nothing fancy about The Timeshare Store but seeing the opperation in person made me feel very comfortable with using them.