You got to be kidding
AMfone, ARF, eHam, QRZ, QTH, most e-mail reflectors, groups.io reflectors, various social media sites, and flea markets are starting up in NY, NJ, PA shortly.
If it's free to post stuff "For Sale" on some electronic-related site, why would you care if they cater to just vintage electronic related items. Someone might want a meter as a coffee table center piece.
People do weird stuff with stuff.
OR
Beach Blanket and wares and find a sidewalk and you're in business