An airline owes you $2500 for lost luggage on domestic flights. They aren’t going to make that up by selling to places like this. It’s not like they tell the department responsible for getting your luggage back to you to go through the luggage and determine whether they can make a profit on you.
Anecdotally, every thing my wife and I own are in four suitcases that we take across the country 7 months a year making one way trips.
https://news.ycombinator.com/item?id=36306966
We have to take all of our personal belongings with us when we leave our home so our place can be rented out to cover our mortgage and expenses while we travel over half of the year.
For $2500 we could replace everything that we have in any one piece of checked luggage and have money left over. We keep anything of value in our carry on backpack.