As I have stated on all of my listings (as they all originated from me), nobody knows which were sent or actually used but resellers haven't been sticking to those facts the vast majority of the time. There have been 8 or so auctions that have sold for "silly money" and I've had to pick them up almost every time on the wording of their description so I have more than done my due diligence.
Just as well I also managed to tell any many people as possible the same thing, and I've never even called them rare just collectable. I found most of the cash desk and everybody I've sold to knows that but all of the James Bond collectors who have bought them seem content with the fact that we may never know which of the £35000 sent to the film set were used as I have been honest about it.
There were only 4 £500s seen in the Baccarat scene although about 40 or 50 £100s were seen and there were only 200 made so the chances are better than the other denominations.