For Sale Herpa MTU Germany 4-plane set

Hi
I have for sale a very rare set, which was made in 500 units and given to MTU personnel exclusively. Here are the links of the planes in the set:

http://www.diecastaircraftforum.com/...view-2375.html
http://www.diecastaircraftforum.com/...view-7671.html
http://www.diecastaircraftforum.com/...view-7672.html
http://www.diecastaircraftforum.com/...view-7673.html

My price is $150 yet all reasonable and unreasonable offers are welcome.
Thanks