I just got an awesome idea for this that would prevent wasting money from excess shirts and be awesome.
So there are these things called Pop-Up Tees, (if you know what they are skip this)
and what they are is for a few days or a week or so you pre-order their designs and then after the time is up they make them and ship them. Then they don't make any more, so they're all original (ish?) and they prevent waste from excess shirts and disappointment from running out.
So what we would do is have like a shirt a month or something and so every month we would have a different design from out T-Shirt Design staff ( I would totes join) (we can still have design contests too) and so during that month ppl would pre-order and then we make however many sold and ship them out.
ta-da!