I just bought a bike trailer for my kids. I found a reasonable condition second hand one. It cost almost 200 euros. I still got a good deal as new ones with the same brand and literally zero improvement would have cost around 900 euros. Quess what the similar bike trailer did cost as a new in 2012? 340 euros! This quite simple mechanical thing has seen in average 9% price rice/ infaltion every year for 11 years straight. 😯😯 Insane.