It creates a dilemma for sellers too.
I have a spare Arc AAA that's still in its package and has never been opened. Of course there's no way to tell that, since the packages aren't sealed. But I bought it new and never had any reason to open it. I already had an EDC Arc AAA and the second one was just a spare I was keeping around.
With the insane ebay prices lately, I've thought about selling the spare. But how would I list it? Usually, unopened packages are desirable, so I wouldn't want to open it. But that means I don't know if it has the stalling problem or not. So I'd have to describe the stalling problem and say it MIGHT have the problem, I haven't tested because I want to leave the package unopened for collectors who care about that.
But we all know, "untested" is ebay-speak for "known to be broken". Maybe my best bet is just open the package, test the light, and put the test result in the description.
It's all theoretical though, I'm not really planning to sell it.