At the bottom of the of the post you posted is an icon and the words report concern. Click on report concern and type you would like the administrator to delete this post. The Pricescope administrator will delete the post. It may take a few hours for your post to be deleted.
You can edit a comment for a limited amount of time after it was initially posted - 45 minutes, I think. It will show as having been edited.
You can also delete a comment for a certain amount of time - I suspect the same 45 minutes that you have to edit it in.
You cannot edit a title, however. And I suspect, though I haven't tried it, that the title of a new thread will remain even if you started the thread and then delete the initial post in a thread. However, you can alert an administrator who can edit the title of a thread, or delete the thread altogether.
You cannot delete or edit something posted by another member, even in a thread that you started.