Board Thread:Questions and Answers/@comment-27011763-20150923120217/@comment-26518423-20150926015149

Yes. I bought an electric loco for gems, and a few cars for coins. To complete the set I needed another 32M coins. I wrote down the name of the cars that I needed. 10 days later I had enough money, sent a request to support, and they sold me the cars.

It was helpful that I knew the car's name (Ave 2nd Class), its cost (755K each), and how many I needed (45) to complete the set. The prices listed on the Wiki are usually accurate, but not always.