How to sell old Star Wars sets

I had an addiction to Lego Star Wars sets and still have them all from when I was a kid. They’re at my mom’s house, and she said she’d give them to me next year. I think I want to keep some for my future kids and/or if I just like the set. But my question lies on how I go about selling the ones I find to valuable to keep? I have an eBay account where I’ve sold maybe two things in the past. Some of these on brick economy say they have some crazy value, like hundreds of dollars “used”. What...