This is just a sample T-shirt Claudio! It costs less than 10 USD. If I order more the price may come down to around 7 USD per T-shirt.. I would like to give one T-shirt Free to whoever has bought the Pocket Miner. But the shipping cost is the problem.. From what I checked now it will cost an additional 30 USD per T-shirt for Shipping alone! Let me find a solution to overcome this!