I would insure it for the $2k number and if the worst should happen let the insurance company do the work to try and discredit that price.
This gun was originally purchased by my grandmother from my grandfather from a friend who used it durning his time at the Dallas police department. My grandfather liked it because it was nickel plated and none of his other firearms were that way. When he passed away it was gifted to me along with his other firearms. Normally, I am a purist and I would rather have it blued like it came from the factory. But because it was his firearm and that's the way he liked it I plan on keeping it that way.