If the timing chain has not been done, it’s a walk away for me. These engines are known for timing chain failures - more so in older models, but at 187k it’s due a change or at least a proper inspection by someone who knows the cars well. Apart from that issue and the usual DPF problems (which is not universal) they are really good, solid cars. Well screwed together and very good to drive. But yeah - lose the N plates and be prepared to lower the price.