Lead crystal animal statues, seashell sun-catchers, discontinued collectible figurines, embroidered outdoor flags, copper mailboxes with embossed wildlife scenes and other boxes of stuff I haven't gone thru yet. My niece has sold half a dozen items on Etsy for around $20 a pop plus shipping and a couple of small sun-catchers for $10.
She is working full time now and has lost interest. I have time on my hands and most of the stuff is easy to ship, so I have decided to give it go, rather than let it take up space in the garage.
EBay gets the most eyeballs and I would sell most things there, despite 15% fees when it is said and done. Some hobbies do better in forums (poker chips) and others, eBay is still best (board games). There are some good Facebook groups for selling things too. I had some old model train stuff and it sold quickly at a fair price on fb.