In Germany you can buy Stollen at Aldi for 4.79 € / kg https://www.aldi-sued.de/de/p.wintertraum-marzipanstollen--kg.000000000000272686.html

Here in Korea our local bakery sells them too https://www.instagram.com/p/DC8UzE6PL8I/ but the price is 35,000 ₩ for 500g, or 47.55 € / kg which is basically 10 times the price.