ill get one
but im not sure why 400 dollars is the magic number. that design looks like it is from customink.com, which ive ordered from before. shirts are cheap there, especially if you have limited colors of the print. im guessing those shirts would cost about 15 dollars at the absolute most if you had about 15 people interested in them. total would be 15x15=$225, and i think thats a high estimate.
how about you do a general anouncement at the next 4 or 5 shows that anyone who wants a shirt, give you 20 bucks. or maybe even tim could do it at setbreak of each show over the PA. after 4 shows i bet youd have 15 people paid easily.