He is worth a lot more than a 6m transfer fee, surely its only that low as City want the wages off the books. To me its Spurs and Ade that need to be coming to an arrangement ie a bigger signing on fee to cover the lost wages.
You would think with the amount of money the club spends buying all of the team shirts and training gear that they could do a unique design (Last years budget for team wear was £1m!!)