50 Euro Mediamarkt voucher FOR 50 Euro Amazon voucher or cash?

Good bye, My question is, does anyone know how I could exchange a €50 Media Markt voucher for an Amazon voucher or €50 in cash? I've tried everything at Media Markt: I tried to buy an Amazon voucher with a Media Markt voucher, but it didn't work. I tried to buy something for 50 euros…

Sales of used goods by private sellers are reported to the tax office if they exceed 35 sales or €300 in revenue per year. What about barter transactions?

Sales of used goods by private sellers are reported to the tax office if there are 35 sales or a total of approximately €300 (I don't have the exact amount at hand) per year. The platform on which you sell, be it eBay, classifieds, Vinted…, automatically reports to the tax office if the amount or…