Must admit it is not in my major realm of interest but I am sure there are people out there who would be interested.
It may even interest some of those who go for airliner flight sims to give them an idea of the procedures were adopted by each operator.
The cheapest marketing option would be to list them on the dreaded Ebay and record each disc from the master copy on your computer as and when you sell one. With printable DVD’s and an appropriate printer you can make them look quite professional. I think you can even add short videos to Ebay listings now so you could always have a preview to help sell the DVD.
Maybe a posting on the commercial aviation and flight sim forums might give you a better response and a better idea of the likely demand.
If you really don’t want to do the selling yourself then by all means PM me and maybe we can work out something assuming that there are no copyright issues with the recordings.