I definitely hear you. I have a Skyrim save that still has ~18k "weight units" of loot that I need to sell. I recently started sizing it down from ~42k units. I used to just dump it all in a chest near the vendor I use when I need to clear space in the player inventory but then I installed a mod that lets me open an inventory with a spell. I could leave that 5 weight, 1 gold-value item behind but that's literally leaving money on the table.