I went to an estate sale of an International Harvester collector. Turns out he was an employee in the 70s and 80s. I did OK with the "collectible" stuff I bought, model tractors and so forth. But the real winners were a couple of old IH promotional employee items I turned up out in the garage. Paid $1 for an old vinyl first aid kit that sold for $70 and $1 for an small digital desk clock that sold for $35. And I didn't have to race the other dealers and pickers to them.