You may be better sticking them on eBay, you’ll get a bigger audience and probably more money. You select which postage method you want to offer, Royal Mail, Evri and I think another courier. Buy pays postage and eBay send you a postage label for you to print at home or a 2D barcode to take to the post office or Evri drop off point, they’ll scan the code and print your label for you. All you need to do is find a box and package them up. I ran a business selling on eBay for over 20 years, it’s really easy now.
And it is now one of the most expensive places to sell anything as a business seller. Put the items for sale on Gumtree it’s free for the advert and no fees to pay.
Agree for a business seller ebay has priced itself out, the rot started years ago when sellers were prevented from leaving negative feedback, promoted listings was a killer for me. But it’s totally free for a private individual seller, except for motor vehicles.
Totally agree I also had a huge business on eBay but it is no longer viable with the postage cost and the fees. Another big problem I have now found listing the odd item they can now just change their mind with no consequence, say the item is damaged and want partial refunds. The amount of fake stuff on it now is ridiculous, and if you report them eBay say it is ok.