Nothing rare or priceless at my house. And that is not just trains.
Maybe 'difficult-to-find'. Some LCCA or TTOS Standard O cars. Might be hard coming up with more of the K-Line Shadow Rail O-81 curves.
If its flooding or the house is on fire, kids & wife, and maybe checkbook or credit card, are coming with, the rest can burn for all I care, it can all be replaced. Burglar comes into our house, they will be disappointed. Even the house, it is not our most valuable asset.