I guess I've been living under a rock.
I found out just this week about FaceBook's Marketplace.
Shameful I know, but to make up for being so behind the times I shot a tutorial video on how to sell items locally online with the FaceBook Marketplace.
There are a few options to sell online and I myself have used the full few.
I've used Shopify before but for selling locally it's a bit of overkill. Shopify is a great platform that I recommend for e-commerce as it makes a great store, but for selling locally there are free options available.
I'm using Kijiji and the FaceBook marketplace right now to sell art locally.
If you're interested in selling items locally then check out this video.