Are your 20 gauge hulls reloadable? YES!
The real questions are How reloadble are they?
And how many times can you reload them?
What you have are NOT AA-hulls, neither the newer (version) of what Winchester uses nowadays for 'AA' hulls, and not the older version that are no longer made.
But your hulls should be reloadable! If I lived near you I would ask you to give them or sell them to me before just throwing them away.
As for 'selling them,' I have no idea what others might be willing to pay. But in a 20 gauge I strive to load 1-ounce loadings for almost everything, and cutting one of your hulls open (length-wise) to get a view of what the hull looks like inside, and looking specifically to see if the base-wad is low or not too high will help you understand how much volume your hulls have.
Hope I said something useful. I've been reloading shotshells for over 40years and much of what I know is from experience, not that trying to 'describe' or explain something is "easy."
