I'm selling TP scripts in my tower for 1c. Each script is to a location that is no longer accessible. When you click to spend the energy to teleport, instead of teleporting you get a message about how the teleport failed and you get 100 iMG to make up for it. No energy is deducted.
It's a bit tedious to get iMG this way but it's super cheap!
Edited to add:
You must have the Teleportation 1 skill to use the scripts for this.