10k or 11k should be doable if he is buying privately. This one looks tidy and has a few extras such as the 18" alloy wheels and heated front seats (they were optional extras on the F10 in 2010 and 2011). Also claims to have a FBMWSH.

https://www.donedeal.ie/cars-for-sal...w-nct/12187495

Timing chain is still an issue on the F10 so I would budget for it. I'm on my second F10 myself and they really are a step up from the E60.