PODS! seem to have the best stuff due to people pack pods at there homes and they keep filling them up day after day.
On the other hand, once they are filled at home and transported by the Pods people to a warehouse, they are THEN pretty inaccessible. SO, it's a two-edged sword. If they put really nice stuff in there (at home) it will be hard for them to pull it out at random and that's good for us. Their container may be 50 feet up in the air and hopefully NOT in the middle of a three stack row.
The other side of that sword is that they MAY NOT put super nice stuff in there knowing it will be hard to access.
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On a related note: went to a vault sale at a non-pod facility; same idea though, break open the front panel to show the insides. These typically went HIGH even before the newbies showed up, and often were just like any other lkr from what I heard...I never got one due to the prices.
There may be some truth to the idea that these are packed by people on one side of the country and moved a long distance. Several of the vaults I saw at one sale (Mayflower) were stamped ITALY all over the place, and the prices were outrageous because people thought there was going to be lots of valuables in them.
Talking to the buyers who got them....turns out they were military (and low end troops at that) who just shipped all their crap back to the states. Now if had been a colonel or general it might have been a different story, but then those guys probably wouldn't have defaulted now would they.