Educate me please

[9path6]

Hey, I'm looking at a 1996 pathfinder with 132k. Car has CEL awner says its for O2 sensors. He replaced but it came back. Besides that he has only replaced battery, manifold, and cat temp sensor. Do these cars have an O2 sensor history aside from average vehicles? What would you all assume is a fair peice? Anythi g I should loom out for when I check it out in a couple days?

[Livin_AZ_Style!!]

We've had a pathfinder for the last ten years. my pops has a 97' se pathy and he got it used with 20K miles on it back in 2000. we've never had a problem with an O2 sensor.

[9path6]

Hmmm I wonder about that sensor then. What do people think it should be worth with the given info? And if anyone has insight on that sensor or what I should pay attention to when I see the car.