I am one of the many noobs who have a taste of this and plan on sticking around. 

Uhaul auction yesterday that was advertised two units and ended up being up as one as a tenant paid up.

Unit was in rough shape 10x10 and maybe 1/4 full with a couch and boxes that had been gone through as the packaging tape was visibly torn off or cut.  Contents of most boxes appeared to be mostly clothes.  Loose items spread around unit but nothing that jumped out at ya.

Auctioneer self promoted for about 15 minutes prior to starting the auction off at $200...no bites...random offer of $25...and the auction was on.  Of the 30 attendees only 3 bid...ended at $230 to a young lady who may have consignment shop ties.

I stayed away from this unit for mainly one big reason, I attended a group of Uhaul auctions where this location was to be the last on the circuit.  The auctioneer while at earlier sites announced that this specific location had been canceled due to the tenants paying up, it was also scheduled for 2 units last month also.  So upon inspecting the unit and seeing that the boxes had been opened and with loose items spread about I would say it was safe to say that the this unit was previously to be auctioned off.  The tenant paid up and removed what valuables they could and let it go into default again.

Another auction in my area (West Michigan) with advertised 3 units...I am out of stuff to sell so I will probably be a bit aggressive at this auction.

I am in West Michigan, picked the unit up in Grand Rapids Michigan