Highly recommended.  Cart Life is a retail simulation for Windows which showcases the lives of street vendors in a small city which is located in the Western United States. Each of the playable characters has specific goals and special traits, but also unique addictions which the player must accomodate in order to succeed within the game.

You can get the full game for free from the link below, or you can pay $5 for the ‘everything edition’:

UPDATE: This Game Is No Longer Available