Stop in for a cup of coffee

do any of you know what to look out for when buying a dodge ram diesel

its a 2002 with 120k miles and looks good but i dont know the common problems with them if any??
They can have issues with the injector pump if you don't run a good lube in the fuel. I have a 2002 I run power service with every fill up, no problems with mine 140k on mine. And they need a good lift pump to help cool the injector pump.