It's under "Indestructible".
You're probably also thinking that this might be a good way to make money right now, but I'd advise AGAINST stockpiling these types of items at the moment. You might want to flip some for some quick profit since they're in demand at the moment, but honestly it's better to buy items that won't let you die to begin with.
Although dying is inevitable, even for glass cannon types pushing out some extra DPS will let you kill more mobs without dying. Thus, this stat will become largely worthless with inflation and better item drops in the future regardless.
Enjoy the short term profit while you can, but keep your turnover ratio high or you might notice an ever-growing unsellable stash of items looming up...
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