When you make a city, connect it to at least two cities;
one with water or some other major resource and another that needs
it (water works best). Do not have that resource in your city
or the glitch will not work (for example, water pump, power plant,
etc.). Make the connection to these two cities using your city
and go to "Neighbor Deals". Under the deals, select
the resource to buy, then the other city to sell to. Then, cancel
the buy, but not the sale. Follow this exactly. Select the pull
down menu and reselect the resource you are selling to the other
city. If done correctly, the dollar amount should significantly
increase. You can now reselect the resource to buy. After a few
months, the game will reset the dollar amount but you can do glitch
again. When using water, it is possible to get all the way to
1,000,000,000 Simoleons. Note: If you play the other cities, make
sure you check on the Neighbor Deals. You do not want to bankrupt
the cities. [Screenshot]