I think Ebay, Market place and Gumtree

Our area has an annual car boot sale, and this is a good place to sell items quickly without the need for an account or postage.

Facebook buy swap and sell pages in your area. Otherwise ebay or gumtree. Ebay is best if you can offer postage so you get a nation wide audience. Same with gumtree. Although with gumtree I’d suggest a separate mobile phone number and possibly a paypal account if you also need to post items.

I have used Gumtree and have sold items successfully locally and is quite a safe and secure site. Have a browse of the website and see if it suits you .

If you’re on facebook you could join your local buy sell and swap sites. That has been my most successful way of selling. Other than that there is Gumtree or Ebay. Not sure of any others sorry.

I would get onto Google and check out your options. Lots of info online