I would like some brackish stocking ideas that I can put 1 or two fish of. I do not want mollies as these are unsuitable for ten gallons and I've done mollies to death.

1. Must be able to live it's entire life in a ten gallon aquarium as the only larger brackish set up I have is thirty gallons and is strictly inhabited by one GSP.
2. Has to be able to live in groups of 2-3 or less one is okay. I'm just looking to liven up my tank.
3. Can't be more than 10 dollars a fish (cuz I'm a broke college student)

If you can, provide me with the name of the fish some general requirements or a link so that I can properly research them

Mollies and Bumblebee gobies. You can getaway with green spotted or figure eight puffers but they are very agressive and be selective on their tankmates as they are will; be more agressive because of close quarters. I would definielty add a bumblebee goby and one or two puffers but it is your choice.