Good post and two points .......I have listed all my equipment along with the serial numbers as well as the the retail cost of each piece on legal paper. I do this so when it changes the list can be updated. However, in the event of a fire I also have pictures and all that information. So, the total cost of the system is there and is safe. I put that in a sealed envelop and goes in a fire proof box in the basement. I told my wife when I die that is how much the system and each piece of equipment x is worth and don't sell it for all that much less if you can. The heck with the rest of the stuff in the house
Second Point .....if neighbors or friends ask how much ...which I personally think is rude, I give them the brand name and what model and then say ; go look it up on yuor phone or home computer. They never ask again.