Here's the two that I have used that seem reputable and have been or are current sponsors on the boards.
https://dvcrequest.com/ (requires a deposit, but is very good about canceling when on the waitlist)
https://www.dvcstore.com/ (Current DIS sponser)
David’s is one I am waitlisted on. The other I just sent an email to, so we’ll see what they say.
Tua ks
I just went on a similar journey. Tried renting 123 points through a DVC broker for the first time not realizing how hard some rooms & dates can be. After being put on a waitlist for BWV Studio or BW View by the broker, I ventured out to find a private owner renting at BW or BC.
I found a BCV owner with points to rent but at one week past the 11 month window the first 2 nights were already unavailable. Fortunately this owner also owned at Poly and offered to book the first nights there.
If we go this 'high demand' route again we'll look for an owner a couple weeks prior to the 11 month window in hopes of having points secured before availability disappears.
Yeah, I got in on this late. 10 months out, but I would have tried to have someone lined up before 11 if I knew what was involved. Of course my plans at that point were for a studio, and between my wife wanting a bigger room and my mother deciding she would go after all..... 2 BR it is. I’d have been stuck either way.