That's a bad idea, kentdaddy, since the places you buy from have already given the university its cut. By not buying, you only hurt the retailers and resellers. A letter to the university might be a better use of your time (or not).
On the other hand, I'll bet there's some merchandise to be had for a better price now.
"The freedom of individuals to verbally to oppose or to challenge police actions without thereby risking arrest is one of the principal characteristics by which we distinguish a free nation from a police state."