Hi guys, newbie to these forums 
Looking to get my first z4, my first BMW actually. I was initially in the market for a 2005-2007 model but I have found a surprisingly cheap 2011 model. The car has no service history, and it's a previous cat D with bumper damage apparently. The screen on the inside is also broken however I don't suspect these to be major issues. £6k is the agreed price and he doesn't object to having a mechanic check the vehicle. What should I be looking out for? Is this one of those too good to be true things?

Looking to get my first z4, my first BMW actually. I was initially in the market for a 2005-2007 model but I have found a surprisingly cheap 2011 model. The car has no service history, and it's a previous cat D with bumper damage apparently. The screen on the inside is also broken however I don't suspect these to be major issues. £6k is the agreed price and he doesn't object to having a mechanic check the vehicle. What should I be looking out for? Is this one of those too good to be true things?