I've usually avoided making a post if I needed to post images, I hate the faff. Saying that, a week or so ago someone posted pictures of step by step instructions to post pictures using
www.postimages.org. They were excellent so I posted something for sale this week and it worked a treat. Really easy. I can't find the post now though.....
something like: save the pictures on your pc (where you remember they are!) log into -
www.postimages.org / sign up / choose hotlink for forums / click on copy icon / paste into forum. I'm a luddite really.... so you can do this on a smartphone of course.