The official BMW ebay store have a sale on, including my personal highlight - an official BMW bin!
BMW Genuine In Car Interior Clean Waste/Storage Bag 82270416591 | eBay
They also have a BMW laptop slip case for a fiver, iPhone 3G snap in cradle, a few wheels at almost no discount, and maybe one for @cforehead a full set of E70 X5 mats for £60 instead of the RRP of around £134This textile bag with a removable plastic liner can be attached to the nets on the seat backs or to the storage net in the front passenger footwell in a matter of seconds. Alternatively it can also be placed in the door pocket or glove compartment.
full sale listing at SALE - SAVE UP TO 80% from bmw_direct