Storage auctions are a waste of time. You have to realize that if someone had, say, $300 worth of stuff in their storage unit, they'd more than likely:
1) Take it out of the storage locker when they realized they couldn't pay
2) Pay the $20 a month
Having been in charge of cleaning out abandoned storage units before, I can say with full confidence that everything on Storage Wars is staged. Most of the stuff is thrift-store rejects, stuff like holed clothing, utensils and dishes, all very low quality, outdated appliances, etc.
Suffice to say, if you had a million in cash, you'd be better off buying the storage units themselves and renting them out rather than buying the contents at auction.