I did not check to see what the tee shirts cost but unless they are way out of line price-wise to me it would be a good investment, a good insurance policy, considering the average cost of any decent breeder-name beans Attitude sells. If you were buying some of the KC Brains $18.81 seeds I would take the risk but if I ordered beans that cost $50 to $100.00 or more and especially if I ordered several or more packs the price of a tee shirt would more than be worth assuring that the order arrived safe and sound in my opinion.