One thing I feel was most important about part of buying auction units, was saving money when transporting your items.
So much money can be lost when moving items. I found that having a trailer allowed me move items quickly and easily. Truck rentals like Uhaul can add hundred of dollars in extra cost to overcome, a trailer cost me almost nothing.
Fun Fact: The trailer was a old bumper pull travel trailer, that I cut off the top and paid $35.00 dollars for @ auction.