Commemorative Mint Sets

Looking for some advice. I have duplicate Commemorative Mint Sets from 1980 to 1987 (missing 1986). I'm not good at ebay and I would rather trade someone for stamps of value to me.

1980-1983 are open, but complete
1985-1987 are open but still in original condition and in the original envelope. (stamps not placed on pages)

Here's my question, would you sell, trade or keep? Mind you, these are duplicates from my collection.

Thanks all.