I've another question: if we offer free delivery and the buyer chooses Express Delivery, and so pays the full cost (£4), does the seller still also get charged the £3.38 for Standard Delivery? I haven't seen anything to say we don't, as would be fair. (Well, it would be fairer if the buyer only paid the difference between Standard and Express, just as I used to charge only £1 extra if they chose Tracked 24 when i was offering Tracked 48 free.)