As the person who bought the 22 cars from Stout, plus 7 others at the same auction I can say they still are the most amazing passenger cars built in any scale except the 1/32 models of the same two trains made by FAM. I've bought about another 10 cars since. Until the Key CZ cars materialize there is just nothing that comes close.
Interestingly, the person who was bidding against me contacted me and in the end he got 12 cars of the 29 I bought that day all of the same serial number (I was missing the second matching diner). He is a true Dreyfus Hudson nut even buying a 1/12 scale model built from scratch by a person who worked on them for the NYC and after he died someone else turned it into a masterpiece, just an absolute masterpiece.
After all was said an done I paid ~$515/car delivered. The $800 shipping charge caught me off guard but they were delivered by a delivery service not a common carrier. Given how much the unfinished and undecorated Wasatch UP cars and the PRB Super Chief cars go for I'm happy with what I got.
There were 500 Lionel 13 car sets made as described above and they are all 2-rail. There were likewise 500 2-rail Hudsons with, I think, 4 different numbers (51-54). To buy the cars you had to buy the locomotive. There were also some number of 3-rail Hudsons built. Jerry has at least one of each and he says he never paid more than $1500 for any of them.
FAM also made 500 13 cars sets in addition to the Lionel sets. These are the ones in the green FAM packaging. FAM also planned to make 500 sets of Broadway cars but they were never completed. As Keystone Ed stated the Lounge car and the Observation cars were not correct so FAM and the builder parted ways with the Diner and RPO never being made. I also have 3 of the Broadway cars and while I like them the best they will not match the upcoming GGD cars as the paint is very subdued on the FAM cars.
IMO the current listing on Ebay is overboard. I would say a C-9 or better set with all matching serial numbers would be worth ~$10K. And it goes down from there. Maybe it's a divorce thing and the guy doesn't really want to sell them. Not to say someone might not pony up but they haven't done their homework and...