Kijiji is my pick. Sold my Xbox One for $400 cash and it sold in a day. You might get some low ballers though.I want to sell my PS4, where can I get the best price for it? I got in February btw
eBay is good but it's more hassle because you gotta ship it.
Ebgames will give you about $270 in trade credit and more if you trade towards games or preorders.
I guess it depends on what you plan to do with the cash. If you want more games, maybe ebgames for the credit. If just cash, then kijiji or eBay