Hey everyone here's a link to the cheapest front 02 sensors I found online. I just got two myself. Just thought I'd share my find!!!!
Amazon.com: Bosch 15175 Oxygen Sensor, OE Type Fitment: Automotive

 

Thanks for the link. I am in need of one, and for $30 less than local purchase.

 

Ditto

 

nice!!.. (cue the person that says there no good)

 

The last Bosch sensors I bought were reboxed NTK, which were OEM on my '95. Wouldn't be surprised if these are too, but they'll save you 2 cents.
Amazon.com: NGK 25044 Oxygen Sensor - NGK/NTK Packaging: Automotive

 

These are the real deal... I got mine two days ago and they are Bosch.

 

Oh ok. Well, Bosch or NTK, either is fine AFAIK, though I've always used NTK.

 

At your mileage, why are you not replacing the rears?

 

Because rears don't do anything but monitor the cats. Waste of money.

SOMETIMES they can be used on SOME fuel injection systems as backups for the front sensors, if the front's completely fail, but being that they are after the cats, they wouldn't be able to do a very good job.