I once bought a 12'x30' locker with 12' ceilings. It was an entire contracting business that had closed down and the owner had thrown all his tools and tons of materials in this unit and defaulted. Unfortunately this was before I started keeping pictures of all my cool finds.
The facility actually let us have a garage sale out of it for three days. It was awesome, sold 7k worth of stuff (only paid 1k for the locker) before we even had to move anything out. Instead of having to move truckload after truckload of tools and equipment and lumber and racking, we got to move a couple truck and trailer loads along with a pile of benjamins...
I got multiple air compressers......emglo and dewalt. I got 20 plus battery operated tool kits....a huge knaack job box that I literally filled to the top with just battery tools, drills, saws, corded tools, etc. Big drill press, lots of lumber, plumbing, electrical, etc. It was a big project, but it paid off very well......we were still selling items off over a year later!
I bought another locker at that facility a couple of years later and got another unit where the guy did nothing but commercial bathrooms. Got five brand new in box hand dryers....you know, the electric ones you mount on the wall and push the button and it blows hot air to dry your hands. Battery operated tools. Tons of stainless steel kick plates for the bottoms of bathroom doors, stainless handles, door closers, soap dispensers and paper towel dispensers, all brand new in box stuff. Pallet racking, three big propane powered bullet heaters (I think I have pictures of some of the stuff out of this locker in one of my old postings somewhere...MM?)......lot's of electrical stuff, tools, carts, etc. Another great locker and I only paid $300 for it.....bunch of other auctions that day and hardly anybody showed up to this one!
I've had others.....concrete contractor.....thrift stores (for some reason a LOT of those go out of business and then default on their inventory.....lol)....Commercial kitchen equipment.......guy that made and sold all kinds of supplies for Mason Bees....some weird stuff, but a profitable locker...........Bakery/Candy store......dressmaker with totes and totes of materials and patterns and sewing machines and dress dummies, etc......commercial fire sprinkler system guy with tons of orange fittings and pipe and a bunch of ladders and tools..........cabinet maker with saws, planers, jointers, etc. It goes on if you have been doing this awhile.......especially the "pre show" era.......only a couple of those have been in the last two years!