If you want cheap tins, there are plenty of suggestions in older threads. See:viewtopic.php?p=8100viewtopic.php?p=31418
Specialty Bottle is pretty cheap.
That said, not wanting to spend more on the thing you're storing your tea in than the tea itself is short-sighted, because the tea will be consumed, but you can reuse most containers. If you're drinking tea which goes bad quickly, you should invest in containers that will keep the tea fresh longer. Also, cheap containers often have off smells that are sometimes not easily removed.
Using good quality resealable pouches / bags, or investing in some of those things which you clip over foil tea storage bags might be one way to go... I would do this over using a cheap tin.