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since the stuff is for sale the value isn't really important anyhow.
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Actually, knowing the value of what you have sitting in your house is very important in the event you have a loss.
As an example, we just had a lightning strike knock out our fridge/freezer. The funny thing I learned was that the deductible applied to the fridge repair but the food inside was completely covered with no deductible, as personal property! And no, my vintage caviar collection wasn't in that fridge...but our steaks were, and 3 dozen eggs. (We didn't know the fridge was out for 5 days, so you can imagine the smell!)
At least my son had fun throwing the 3 dozen eggs out in the backyard.