The second-hand 'boom' in Madrid: bicycles, motorhomes and sofas, the star products... and Monday, the favorite day to buy.

Milanuncios highlights the Community of Madrid, which leads this market at a national level. The region also leads the number of purchases and sales on Wallapop, an application that has gone from 170,000 users to nearly 17 million in the last decade. In these 10 years it has given a second chance to more than 640 million products, or what is the same: as if each person registered in Spain had sold more than 13.5 objects.