Buchmann HO train set 41-635-A4

[donsch]

A friend of mines father pass away and he found, what appears to be a very little used Buchmann train set.  It has a N&W GP 40 Loco and a GP$) dummy loco, 6 N&W coal hoppers and The Red thing that brings up the rear.  Coupons in the box expired 3/31/1985.  Anyone have any info about this set and what it might be worth?

[Bucksco]

http://www.bachmanntrains.com/home-usa/board/index.php/topic,21665.0.html

[ACY]

Depending on condition, it is worth about $20, best case scenario you might be able to get $30 if everything is sealed and unused.
Sets like this generally have more sentimental value than monetary value.