A complete original gauge 1 version (with a square cupola instead of round) and the two waiting halls, filler pieces and side walls typically goes for around 40k in like new condition.
He is showing a gauge 0 version, and I do not see all the waiting halls in the pictures, but that does not mean he will not make them.
The station pictured in Gardner's link is the gauge 1 version (taller and with a square cupola)
The litho on the side roofs and bases is not a lot to do, the rest of the building can be painted.
Just my 2ยข
Roland