There are various websites one can find to create sale listings online. Begin by snapping some great looking photos of your merch and have them ready to upload. Be prepared to write some snazzy sales descriptions about your things. Also carefully assess the value of your items and write them down somewhere. Now you’re ready to sell online.
eBay
Amazon
Amazon FBA
Etsy
If you’re a creator of quality goods, you may want to consider creating an Etsy shop. As an artist myself, I tried Etsy once. However what I didn’t like was that I had to pay per listing. ($0.20 each) Also each listing has a limited amount of time it can be displayed on the web. However Etsy exposes you to a customer base that is seeking handmade items, so you may be able to sell your products successfully there vs. on another marketplace. I don’t personally recommend Etsy, but there are plenty of success stories that were made there.
Good Ol’ Craigslist
Craigslist is still one of those tried and true places people use to sell their junk. It’s a fairly simple platform if you don’t want to mess with the processes of shipping labels, bids, or limited web display times. (While your ad may only be up for 45 days, you can repost it after the expiration date.) You are however limited to local areas and it will be up to you to close the sale on any buy requests. I’ve sold a couple of things through Craigslist as everyone has at one time or another and I’ve always had a good experience. Just remember to meet your buyer in a friendly public setting. (I usually suggest a Starbucks) dress well and be congenial. Make sure to carry change and if you feel uncomfortable going alone, bring a friend for family member to help out.