How many is too many?

I am looking at buying a used Ford F250 diesel. This will be my first diesel.
I don't want to pay $50K for a truck, so I am looking at new-er trucks with higher mileages.
Like the one I looked at today, a 2008 with 89K miles. Is that to many for a diesel engine? I have always heard that a truck like that is just getting broke in.

Simply, how many miles is to many for a 1, 2, or 3 year old truck?
OR, What is the highest mileage you would consider buying?  

If the price is right, buy it up. But you you can find '05-'07's with less miles for less money and better fuel economy.  

ABSOLUTE highest-mileage diesel truck I'd consider buying used is 150,000. That's not to say there might be good ones with higher mileage than that, but that's about my comfort limit.  

i bought my first diesel in jan of 07 it was a 94 f250 with the turbo t444 international 7.3 i paid 2500 for it with a plow 5spd with 142000 on it i totaled it out at 152,000 when the front springs went the trans bell housing shatered an u had to tow it to jump start it i drove it 200+ miles that way to a dealership where i got 2500 for it and a 99 sd std cab long bed 250 with a 7.3 powerstroke 6spd an it had 194000 miles on it i have but a *** ton of money in that one since i cant go trade it in i still owe 3500 on it but i fear i sell it the person i sell it to gets a truck that wont break cuz i fixed it all, but back to your ? buy a truck no older than 5 years old an dont get more than 100,000 on a duramax or  ppowerstroke an 150,000 on a cummins an no more than 25,000 an no less than 7,000 if its real cheap there is a reason.  
99sd powerstroke building as you read.

Thank you 99s.
Thats the kind of info I am looking for.  

no problem but wait for more info im only 19 an you should get more opionions like mine, but your welcome.  
99sd powerstroke building as you read.

Highest mileage is all according to price and knowledge... If I didn't know much about the vehicle, I'd say 70k miles... That way you have time to learn about it before too much starts wearing out.  
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