You can easily email them to yourself and save them, or use Dropbox.
Or upload the pictures to Photobucket and copy the image url, then paste as an image in your post.

I ment if I have a picture I took of say something im selling saved on my iphone camera roll and I want it in my post without using a computer how would I do so?

Usually, it should ask you to add pictures. Like if you're selling something on Facebook or Ebay. When you make the post/list it should ask you if you want to add pictures. Or theres something you can click for adding them.

I'm referring to on TTG
It only allows URLs

Z06 wrote I ment if I have a picture I took of say something im selling saved on my iphone camera roll and I want it in my post without using a computer how would I do so?

Use the photobucket app if you have an iphone. I just upload the picture from my camera roll on the iphone, then copy the Image URL. Then I go on ttg and click "Insert Image", then paste the Image URL

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All of this is done on the iPhone

Use photobucket mate, just download the app, upload, then either on google on your phone or on your laptop, get the URL and paste it here

download dropbox, its quick and easy to use and uploads all the photos you take onto the app everytime you open it, then you can download dropbox desktop thing and sign in online its great

Wait are u talking about this

Use Dropbox it's a free app that lets you save all your images etc. or iCloud.