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Chair just needs the gas cylinder strut replaced. Other than that it's in very good condition.
Most chair shock struts are interchangeable.
I left it for the next diver that may want it.
Big box office store that sells staplers.
*Salvage one from another dumpster chair or buy one on amazon or ebay. https://www.amazon.com/Oak-Leaf-Replacement-Pneumatic-Universal/dp/B0739WGT8V/ref=sr_1_10?keywords=office+chair+strut&qid=1582610029&sr=8-10