Are you happy with your scope?
If your scope is a good scope and it served you well target shooting before, I would see no reason to sell it.
If you want different features like, more magnification, range finding, a higher end optic or a firedot. That may be a reason to sell and upgrade.
If you are considering selling, you may want to ask yourself, What is the scopes condition?
If your scope is scratched, dented or showing ring marks, you won't get as much toward the new gear.
I would definitely use the ee to sell items.
You may want to buy a couple of things to get your trader rating started.
Some buyers may ask for cash on delivery, or for you to take pictures of the item with another object to prove you have it.
Be ready for people to PM you with offers. ( Don't post an ad and go on vacation

)
Good luck whatever you decide to do.