Where can I go to sell an airsoft gun I was gifted?

A friend gifted me an old airsoft rifle, Crosman Quest 1000x with a scope attachment on top, before he left. I've never used it and I'm not sure if it works. Anyone know of a good place for me to take it to in order to sell it?

If it's not worth anything, I'm happy to gift it to a club or something that may get some use out of it. So suggestions there would be helpful as well. Thanks in advance for the guidance!