I don't know what "cheap" is, but the street selling price of the Thpmas stuff (and many other Bachmann Large Scale items) has been about half of what I find on their website anyways. Maybe it's just a more accurate price.

I own everything except Winston, and I've  installed DCC decoders in them. It is interesting, the DCC decoder has sounds for several other characters (Henry, Gordon, Edward) But not Diesel. So they must not have specified him when they were commissioning that project