Another lovely item and common find in a storage unit is mismatched Tupperware. I never get the matched set, not even close.
And of course every storage unit has a collection of AC adapters. I'm not sure why people would store the adapters without the electronic piece it goes to or why they would keep the electronic piece and store the adapter but I can guarantee that every storage unit has several of these.
I'm still looking for the storage unit auction WOW factor!!!