My MIL in law sells vintage toys on eBay. But she has an eye for items that are worth something and is able to buy low and sell high. She also lives in a place where there are always interesting flea markets or other places which would sell antique/vintage toys to go to. I live in an area that is boring and doesn't have anything like that.
Craigslist is a good place to sell things that are just taking up space in your house, no listing fees and the seller comes to pick it up rather than you wrapping it up and taking it to the post office. Also if you accept Paypal as payment, it charges a fee.
I used to love eBay to both buy and sell. But now shipping fees are so high, I hardly ever buy anything on eBay anymore.
Good Luck
