If still sealed, that can may be worth far more than a new one to a collector.
Completely mint cans like that are rare.
You could sell it to a collector and buy a few new pounds and then also know your powder is fresh.
I am just emptying my last cardboard can of Hercules 2400 that is from the 1990's.
The ones whose collapsible necks would break if you used them too much.
Also have a few pounds in the new plastic bottles.

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NEMO
"Everything 44"