2000 Nissan Frontier How miles from a truck.

I am looking to buy a used pick up and would love to get an idea of how many miles are to many? I am looking at the Nissan Frontier and the Toyota Tacoma. The years I am looking at are anything from 1999 to 2004. It seems like they all have at least 150K miles or more. Most seem to be around 175K miles. Should I keep looking for something with less miles or is 175K not bad for these trucks? Any info here would be fantastic.

Thanks, Eric. [email protected]