Will trade feta cheese for yoga course03:43This browser does not support the video element.Vera Kern, Christoph Ricking / tkw04/16/2013April 16, 2013Nadia Kalogeropoulou from Thessaloniki has been unemployed for more than two years. She gets no money from the state, but has found a way to ensure she gets what she needs: She swaps things.Copy linkAdvertisement