Wow, that is really nice and very unique.
Doing the storage auctions is like getting twice the treasure hunting fun.
I suspect the lessor items could be sold on eBay, or through yard sales, and you guys could hold on to the real "keepers" for yourself or sell those items for even more profit.
You wonder why people leave some things behind, but I believe that, in certain segments of society, it has come to the point were everything is disposable.
I have friends who are very comfortable financially, and they throw away things, without a second thought about it, that I couldn't afford to buy even if I wanted to, and I'm not poor.
I imagine that some of these rooms are the result of people falling on hard times, marriages ending in divorce and perhaps some elderly who had to go into nursing homes etc.
What ever the reason, its your gain, and it looks like a boat load of fun to boot!
I love it, congratulations and good luck.
JCH