OK ladybirder, no dramas, look through your listing and get past the following details. You have your title, condition of item, add a picture, describe your item, how much you want, duration of listing, how you want to be paid - this I think you've done and everything is OK to this point.
Next, I think you are here.
Give the buyer the P & P details. (am I correct?)
If so, there is an option next to the title that says ADD OR REMOVE OPTIONS, click on this, which will give you further options, and you should get an option to click a radio button that says COLLECTION IN PERSON.