Underrail Expedition 1.1.2.4
Grey Army’s armors seem to last forever in merchants inventory. I sold the armors of Grey Army’s fallen soldiers to several merchants and after that those armors were always on sale. Exactly the same models and the same numbers, no matter how many time (and restocking) have past.
I have never seen any Biohazard suit in sale, in any merchant (including Constantine). I have seen Fire suit, Blast suit (even fished one) but no Biohazard suit. I had to wait the end of Expedition to properly loot a certain place filled by a certain very, very bad gas.