I would wonder if injectors have been replaced ever, and if the transmission has ever been rebuilt or replaced. I have not seen many cummins engines make it to a million miles, closest has been 900k+. The ones that seem to get that mileage are long haul tow vehicles ( ie rv trailer transports, car movers etc that spend there life with a bit of weight behind them and lots of freeway). I'm curious as to why the carpet has been removed ( doesn't seem like a vehicle that would have been spec'd with a vanilla floor let alone nothing at all). And how long has his air filter minder been duct taped closed. It's a decent deal if you have money in the bank for that "what if" ( trans or injectors will at least be $3k). I Will admit that I do like that year range dodge (I own one) and although that's most like a 230hp California engine it's still a great platform.