Can I really sell this cartridge?

A number of people gave me great advice on replacing my Denon DL-110 when my little neighbor kid bent the stylus almost off. So, thank you.

But, one comment said I should sell the Denon because people rebuild/modify/hot rod old cartridges. I’ve googled & searches for threads & can’t find anything about this or who I would contact to sell the Denon.

Has anyone heard of this? Where would I sell it? How much should I get for it?

Thanks