Buying viola strings at justmusic.de in Berlin is a weird process. You choose the strings at the desk on the top floor, who give you a piece of paper and tell you to go to the ground floor. By the time you’ve got there, the strings have arrived in a little vacuum tube thing, and you pay for them.

I’m not entirely sure how this works for the pianos and do not intend on buying one to find out, unless they have a vacuum-tube to Iceland as well.