Stevert,
I will ask my friend to call them and order the car set for me. I hope he will agree to help me.
I have bought many models on ebay or internet shops so far. I paid by Visa Card or Paypal. There never were problems with paying by Visa and sending items to Poland. This is a reason why I am suprised that they suggest payment by Western Union. I have never bought models in this shop so I would rather ask before I try ;-). I didn't ask about Manhattantrains and I had many problems.
Thanks everyone for helping me. Arek