Where can you buy a lot of jars?

So I need a lot of jars. They all at least need to be a quart. Preferably half gallon. I don't need them for canning, so it'd probably be better if they were plastic. I'm thinking like those big things of jelly beans you get at sams club, but pretty much anything will do. I don't want to have to eat 50 gazillion jelly beans, and my friends are being uncooperative about saving all their big jars. I haven't managed to find anything on ebay. Provide links if there's somewhere on the internet.