With something weighing that much your probably better off sending it on a pallet with a logistics company rather than seeing if someone like UPS will deliver it. Is it for mainland UK or are you looking towards sending it abroad. I know that when we send pallets within the UK the rate is about £40 per pallet. Give these people a call and see what they have to say, alternatively you could try parcel2go and see what they come back with, as they recommend a number of different courier companies. What is it you want to ship, and why not have a word with gez and see what he says.