Well honestly, they are never going to stop selling them wether you buy or not. The only thing we can hope for is that someone eventually forces them to take care of them. Fish are considered decoration and not a live animal. I am a student too so I can understand I am fortunate enough to live at home though. You can get a betta if you have the requirements. Get at least a 2 or even better a 3 gallon tank, heater and filter, aeration. Which won't be hard to transfer, You also need a tank hood and light. I think you should get ahold of a moderator on here and voice your concerns to them. They all answer on their personal pages. The moderators I can think of at this moment are OldFishLady, Romad, Sakura8 and DramaQueen and they are all great.
Keep yourself clean and bright, for you are the window through which you must see the world.