Im owned hunk back in the times of 2013-2014. its giving around 40kmpl. My research shows that hunk is giving lower mileage than cbz which is 40-45kmpl. My friend of mine who owns an apache he tested hunk and also reported around 40kmpl. Mileage will generally decrease overtime for any two wheeler it all depends on the maintenance. The initial mileage is what that counts. For hunk the resale value will be probably low. If you like it you can buy it and the mileage will be same as honda activa and the reliability will be better than bajaj and tvs.