Hi i have used this place a few times and im very impressed. Prices are not bad, delivery is free and very quick, and the guy running the store is very easy to chat to.
Give it a go. http://stores.ebay.co.uk/HiFi-Connections
Yup, another here.. He needs to put more blu-ray stock on there though as the selection is a bit limited at the moment. I ordered the blu-ray version of kingdom of heaven from him and it was delivered the next day. He also has a website with more titles than the ebay store, but some titles are more expensive on there than his ebay shop.
Before finding him i used to use movietyme for all my orders, but have stopped using them lately as movies are taking eons to get dispatched.