I'm not familiar with modern wheelset so can't answer any specific questions on Mavic Ksyrium Elites. I do think good quality sealed bearing cartridges could take well over 5,000 miles in most cases. The other issue with resell value is the wear on the rims. Rims get beat up, especially on pot-holed roads, and they can't be trued forever. They also wear thin from braking, especially with sand and grit on the roads.