SkwigglesWorth
Magical Girl
Yep as others have mentioned postage is £1.95 per itemwarning when buying collector's editions from CEX not all items are guaranteed.
With that said anytime I've bought something it's always been complete. Maybe I'm lucky.
Anyway with that said I was searching their site and spotted a few deals some might want to take a punt on
Welcome To The Ballroom (part 1) - £6
Silver Spoon (season 1) - £10
Blood Bloackade Battlefront (CE) - £8
Amanchu (not sure version) - £5
Magical Knight Rayearth (parts 1 & 2) - £22 each
+ p&p which I think is £1.25
Blood Blockage Battlefront and Amanchu are only the standard edition (they often use the stock image and sometimes it's the CE), (but it is possbile that you can get a CE as they buy them in as the same item)
Amanchu CE as it's been on sale at christmas you have a better chance of getting a CE. But physically checking in store is the only real way of knowing if you will get a CE version.
How ever if ou do get version without the extra, it is easy enough to return (I'm not even sure you have to contact them), but you may only get voucher (hence why I try to use voucher if I'm buying anything). I've always managed to return for free postage as well.
EDIT: I think they are trying a bit more to decrease there amount of return and if they don't feel an item is good enough, they don't send it out (I'm guessing request from another store to send out there stock). but if low or limited stock they may just cancel the order and refund.