Don't know if this will appeal to many but its the cheapest I can find these, a store on Amazon is even selling a single pack version of these for £6.34 so for a 5 pack this is super cheap. Marked down from £8.99 on the shelf edge ticket but I remember when they first went on sale at sains and they were charging around the £20 mark. I can't see any sign of them on their online store so it must just be clearance stock in stores. Would of got a couple myself but I don't have access to a bluray burner so hoping this deal helps someone out there.
Update: Went in store this morning and the price has come down even further to £1.99, that's about 39/40p a disc. I can post picture evidence of this later or alternatively you could just believe me and buy some.