Diesel Bombers - Too many miles?

Diesel Bombers (https://www.dieselbombers.com/)

- 24 Valve 2nd Gen Dodge Cummins 98.5-02 (https://www.dieselbombers.com/24-valve-2nd-gen-dodge-cummins-98-5-02/)

- - Too many miles? (https://www.dieselbombers.com/24-valve-2nd-gen-dodge-cummins-98-5-02/27162-too-many-miles.html)

I'm looking into getting this 2000 3500 5.9 auto dually. Has been extremely well maintained. I'm going to use this for hauling. All stock other than K & N intake, 5" stainless steel exhaust and rear air bags. He did say his mechanic bumped the HP up to 290 with a computer.
Ad says nothing about mileage. So I asked, the response was 'it's got a lot of miles but still a very strong truck, call for more info.
So I spoke with the man. Over the past two yrs. he has replaced a good bit. More recently a tranny with high velocity torque converter, 32k on it now. A lift pump, new rear end axle bearings, new brakes, hubs, calipers, rotors on front and new drums and hardware on rear. Also new tires, straight tread on front and on road, off road on rear, all ten ply.
He changes his oil every 3 to 5k along with fuel filter. He has been using the truck for hauling rvs. His is the third owner and had the truck for 4 yrs.
Now... he says the mileage is..... 606,000.........
Please help.. How many miles are 'too' many miles??
Lg

606,000 would be too many miles IMO

606,000 You can say it's been in the long haul. ALOT:booo:... But good to see it with that many miles and still running stong:U:

thats alot of miles on that girl how much is he asking if you dont mind

7k, he says kbb is 9500. I haven't had a chance to check it yet.

not at that many miles it aint at 9k. i would buy anything with over 400,000 miles if i was to do any towing or performanec work. i bought 94 last year with 230,000

yeah that too much there, pass there are better less mile trucks out there

How would the mechanic bump the horsepower?? I can see adding a programer or something. I have never heard about dealers being abel to increase the power on the 5.9 threw their computer.

If the truck runs good, it runs good but 9K is way to much.

No man, he's selling it for 7000, said that kbb was 9500. But still, what about the high miles?

You can find lower mile trucks for that price right now. It's 2 wheel drive right? I would wait and find something in the 250k range for the same price.