I inherited a original box stock 70 series, nickel plated, Colt Commander, 1911 in .45 ACP.
When I received it the nickel plating looked horrible. Half of it had flaked off and there were a lot of mild, superficial rust spots. (no pitting.)
cerakoted it Tungsten grey with black controls, etc.
upgraded it to standard non-adjustable combat sights (rather than the tiny original sights.)
installed a really nice wide profile beaver tail safety
installed a long skeletonize trigger.
What would be an approximation of its value now? The cerakote and upgrades have just been done. The pistol has zero blems now.