I have for sale or trade 2 of these high capacity cartridges.
Still boxed (although 1 a bit dog eared) with an install by date of March 2009.
Looks like they sell on the net for about £15 - £20 each?
I'll take £15 EACH - delivered.
For trades - Xbox games may be of interest - but my kids are 9 and 11 so 15/18 titles are not appropriate!
Delivery first class in a jiffy bag.
Payment by paypal or BT.