I'm so sorry about the fire. I can't imagine how that must feel.
Is this question for an insurance claim? Is your insurance new-for-old? If it is, you'd want to know how much it would cost to replace them at today's prices. Only you would know the size of your storage bins and how many packages you managed to get into them. I agree about going to a local store and making some estimates.
It's going to be impossible to guess at the value of what you've lost, but you might be able to work out roughly how much it would cost you to replace them. Good luck!