Rule 3. "Offers" threads. You know what you want for your item, so offers are a waste of time for both parties. If you have no idea of the price of an item start high, you can always lower it.
The Price must be clearly outlined at the start of the post. The price is entirely up to the thread starter and if you do not agree with the price then simply do not pay it ! Or post in their thread that it is cheaper here or there, the owner of the goods decides the price not you.
The price must include postage (to UK mainland) and any fees. A discount can be offered for collection at buyers discretion. The first person to offer the ASKING price gets the goods even if there are offers already tabled but not accepted.