If it's a bigger prop, offer it here, if no taker here, I offer it at work or to family/friends, if no takers there then I thrift/Goodwill/Salvation Army/etc. it.
I've tried offering smaller lots of stuff here & they got zero takers so it all ended up at Goodwill/SA.
I did discover this weekend that a nephew has a similar love of Halloween so he's getting first rights of refusal from now on for all my stuff, especially the bigger props (not that I have many any more). I'm down to 7 Bluckys, (I KNOW RIGHT!?!?HOW?WHY?, but I can't part with them yet), a standing zombie & the Deadwalkers as far as large, store bought props go.
I've only kept the Bluckys because I would love to do some of what Hilda did with hers, making them little ToTers.