Many shoe collectors lament this issue, because shoes are made to only last a few years. Especially with the Air Jordan shoes, there was a documentary/news special on it a couple years ago. I think there's a company trying to develop a more stable sole that will last for a longer amount of time, but my research-fu is failing me. This is why my parents bought me a pair of classically wood soled shoes for my highschool graduation, they're a decade old and still in fine condition.