Looking for the most cost effective and least time consuming way to replace O2 sensors. Ideas?

Just moved to a new city (and state), my 'Check Engine' light came on, went to a garage for diagnostics and it reports that all four O2 sensors are bad. The garage contacts a Chrysler dealership which quotes the parts at $588 (each) for three of the sensors and $462 for one of them. That's $2,226.

I turned to Ebay and other sites and am finding sensors for between $20-$130 a piece. Any input on if these low-priced sensors are legitimate/adequate replacement parts would be much appreciated. I am looking to fix this issue on a budget.


I have read a good amount of the threads on the O2 sensors. I don't have the money or time to buy a OBD2 code reader or have the tools or know-how to check the O-Ring and/or throttle body, and I don't believe I have bad fuel. Looking to, ideally, spend only what is absolutely necessary to make the repair.