I gave away a bunch of old Alfa parts on the alfabb forum. I couldn't believe the overwhelming response I got. Everything I put up was taken, even an unknown condition Peugeot MCU.
I offered local meet or will ship if they paid for shipping. Everything ended up being shipped.
So you can sell or give it away on BF. Craigslist also works great for selling or giving away. The secret is to realize your precious stuff is not nearly as precious to other people so price
it low & sell as a lot if needed. Make it low enough or free & it'll be gone.