Multiple items per thread, and please change the title when sold!
Thought I would add that following discussion here and here and a tweak by samgeorge It's now possible to change the thread title by doing this.
So, if you put multiple items if for sale at the same time, you can mention them all in the title, and delete them or mark them as sold in your title for a period of up to a month after the thread has started.
And if you need the title changed after that....
Originally Posted by Sporky_McGuffin
And as before if there's a reason why you need it changed after that period you can ask a mod nicely.