We just bought a Bugaboo bee from Mothercare for £323.10. We used a 10% voucher which can be found easily by googling 'mothercare discount code'. Postage for items over £150 is free.
Buying 2nd hand buggies on auction sites is not always cheaper than buying new. When you add postage to the purchase price you are often only saving a few £s.
Before you spend £300+ on a 2nd hand buggy , always check that the warrenty can be transferred from the original owner to you. This is a very new product. New products always have niggles. If you have a warrenty you will have any faults fixed. No warrenty and you will be stuck with a faulty buggy !
Sometimes faulty buggies are not collected from the owner. The company will send a new buggy out and rarely collect the damaged buggy. The damaged buggies often make their way onto ebay. If you buy a damaged buggy in good faith it will not have a warrenty. If your buggy has no warrenty you will not be sent a replacement if it breaks.
Always check for discount codes for the large stores before you look for a bargain on ebay.