I’d donate them to a 2nd hand store, maybe keeping a couple, or asking them what they want to keep.
Back in the early 90’s I sold my entire original Star Wars collection for $5, including the very rare Star Wars miniature sets. Ouch.
I’ve listed some of my old He-Man stuff on eBay and came out very well too. Any of their stuff valuable?
My Parents and Grandparents made sure to keep my Ertl tractors around until I could have them at a house. My kids will be dealing with them after I’m gone, as they aren’t for sale. I’ve sold and bought new, but the ones from my childhood go nowhere while I’m alive. As I buy new ones from antique stores I expect mine will all be there someday as well.
Toy Story 3 was my first thought as well. My oldest lined up in age with each of those movies and 3 was brutal to watch.