I just ran across this auction as well as others this seller has for Corgi Airplanes. He is listing them as 1:72 scale, but they do not appear to be 1:72 scale. They look to be from the showcase collection.
Corgi P-51D Mustang "Bunnie", 100th FS Tuskegee Airmen - eBay (item 200220622430 end time May-07-08 18:21:16 PDT)
I hope I am wrong, but I fear that I am not. I only hope that those who are bidding on these know what they are getting.