How on earth did you arrive at the figure if £3.20 to deliver this £1,000 bed?? In your dreams, I imagine. Are you also including the wooden storage cabinet, included in the photos?
Without knowing the exact size an weight I don't know whether this can even be sent by parcelforce, or a courier, or what it would cost. It's up to you to do your research before listing items.
Maybe collection would be the best option, but remember that without proof of postal delivery sellers are vulnerable to scam money-back claims unless paid for by cash.
