Board Thread:Questions and Answers/@comment-95.144.26.215-20150718210938/@comment-26518423-20150719171317

I think you'll find your answer in Categories. http://trainstation.wikia.com/wiki/Category:Extensions#Local_Trains  or search on the topic Categories in the Wiki search at the top of your page. Click on the Train Slots link to jump down the page.

In short, the prices are fixed... excepting the discount you get after buying the Stock Exchange. If I recall, it takes 100,000 bricks to buy that building and it has to remain in your town.