What if any of thier chips fits the 2.5 lV6 avernger/sebring? I checked out their site and unfortunately they dont list anything for the car?

The ICON is discontinued and pretty hard to find ...Last one I saw brought more on ebay then when it was new

Cheap doubtful unless it's not working ....    They were $300 new on a group buy + $50 for software and $25 for a programming cable

There are also things on eBay that claim to add power, those little boxes, stay away from those.  They mess with your fuel curve, and they are bad news.  They also cause a check engine light.