If you really don't need them, because you have your own, there are some local programs teaching kids trades (especially those trying to get girls into trades) they may have a need for training tools, or there may be young folk apprenticing that can't afford good tools. Either donate or low price.

My father in law had a tool making tool chest, everything you'd need for machining setups and measuring equipment. I was in a similar trade and liked auto repair also, I figured once he retired he'd pass then on to me (even sell them to me). Went there one day and all his tools are gone. Where's your stuff. He's like I sold it all for $2000. I was like Nooooooo LOL. Easily 8-10k of stuff.