Welcome back terrorbow!
I had a buddy who was a golf pro at Camelback Country Club in Scottsdale back in the 90s. He rented at a local facility, and he would sometimes buy the abandon units. He found a TON of great golf equipment and sold several complete sets. With Scottsdale being a fairly weathly area, you might find some good stuff. Tempe is the home of ASU - so the units there may be college-type. Then there are the snow bird parks. Many rent units, and some forget about them. Once again, retirees have moolah.
An easy way to pick up merchandise you can turn-and-burn is to attend spring training baseball games. It's a great place to pick up team issued (and free) memorabilia (hats, programs, balls, team photos, bobbleheads, etc.) You'd be surprised how that stuff sells on eBay. People from all over the country eat it up. Tickets are cheap, they hand out tons of stuff during the season, and the games are a little more laid back. This would also allow you to get autographs, which also sell on eBay. (Lot of different baseball teams during Feb/Mar - plus Suns and Cardinal players also make personal appearances all over the area for free!!) Quick and easy way to build up merchandise that doesn't take up much space. I used to live in Milwaukee, and got tons of Packers stuff when the players made appearances. To this day, people still buy everything I list. It does take some time, but at least you don't have to rent a storage unit!
Good luck!