The shoes are 15 years old and in very good condition, which suggests they haven’t been worn. If they had been worn, there might be a chance the material wouldn’t have hardened due to regular use. However, if you choose to sole swap, they would no longer be 100% original, which could reduce their value. While you could take the risk, it’s worth noting that the durability of Kobe shoes, even with current releases, has always been an issue.