Id do this if i knew what i liked, as a very very new person this doesn't seem wise.I'd buy the maximum amount you can take back home with you. I would think you could bring 2 to 3 kg back with you which would be 40 to 60 tins. I'd buy at least another 100 and ship to myself and friends hoping some of it makes it through your customs. If your are taking a significant other or friend, max out how much they can carry back in the country.
Its only Germany, couple hours drive