1817 is a railroad operations and share trading board game in the 18xx series, designed by Craig Bartell and Tim Flowers. The main differentiator is the ability to short companies, that is to sell shares you don't have.
This is the same edition as is sold by Deep Thought Games. All-Aboard Games offers priority availability (get the game within about a month or less). This game is still available from Deep Thought Games with the normal pricing, options, and ordering process.