Exacly that, they bought a inexpirienced CB last season in Koscielny for 9bloody million!!!
...who's had an excellent season bar the CC Final and a couple of hic-ups which are to be expected in your debut season. Just like David Luiz, who's younger than him and has also had some hic-ups and was signed for £20+M. Just because Chelsea and Utd overpay, doesn't mean we have to.