Originally Posted by Mikado 4501:
.....Be warned, they are rather scarce, and they are one of the few older Modern Era pieces that have maintained their original catalog value from their 1999 release.... .
In many cases, they may actually be more expensive than when originally offered. They were a sell-out from the get-go, and still high-dollar. There were articles about how Lionel took extensive measures to get the finish just right on these engines, and they are indeed gorgeous.
As you may know, Lionel also made matching 15" aluminum cars for these engines (which of course were never made in the Postwar era), also striking. Together, it's quite a set, one that everyone will notice. The passenger cars are very hard to find by themselves, however, at least partly because they were also snapped up by folks with the Postwar engines.
A side note - You may have no interest in the matching passenger cars, but if you want the cars, it may be best to wait for a complete set to come on the market rather than just the engines; otherwise it's unlikely you'll find the cars by themselves.