also want to add that if they are having it collected from you and then they dont pay ups, you are then classed as the shipper and have to pay all charges, if you use royalmail ( international signed for) your parcel is tracked within the UK, it must be sign for at the recieving end, if it gets lost then your covered by the compensation, also your buyer can track it leaving the UK on www.losemyparcelwhydontyou.
(only jesting i think its www.royalmail.co.uk)

cheers nomad ps i think people who want something next day have something to hide,been in this business a good few years and you get a hunch(not the notre damme type neither )