It is called a remainder lot floortrader shows up in the back of a catalogue and sell, if at all, for pennies.
Now if left over postal history, that would still sell for a few more pennies and find its way to
ebay as individual cover lots by one of the several big postal history
ebay sellers all beginning at 99c or less.
Edited to add what I often say: Lots of individual items (stamps and postal history) have no real value, all you are paying for is the cost of the labor it took to sell it to you plus related expenses unrelated to item value.