Have you see the Creswell "Liberty Lines" Blue Comet 600E complete set with passenger cars for sale on Ebay. Been there for months, they want $7800 for it. Clearly one of a kind these days, good luck ever seeing a set like this any time soon." I think at half the price it would be snapped up quickly.
Look under Toys and Hobbies, I believe the item number is 591536046.