You're a new member here and other members may be reluctant to purchase from you. Other people who'd rather steal than work have ruined that for you. If a member here is local to you, perhaps you could make a deal? That guy leaves you good feedback and you are on your way!
I've had good luck buying and selling on Marketplace but you have to deal with the scammers and flakes. Since Craigslist went away, that seems the most popular way to sell things. Good luck!