Ive got a used AEM UEGO wideband and gauge, AEM 30-4100
Its got a dent in the side of the sensor:
I only have the silver/grey bezel and the white face.
I bought it used from some noob who took a month to mail it to me, then forgot to mail the output/power end of the harness. It took him another 3 weeks to acknowledge that he forgot the harness, then claimed USPS "lost it." He also never disclosed the dent, then vanished from the forum.
I ordered a new complete 30-4100 UEGO and put that in my car, and a power harness from AEM to make this one complete. I was going to use this one in my truck to dial in the carburetor but never got around to it.
It passes the "Brakleen" test but I've not run it in the car.
Yours for $85 and I'll cover shipping. If you feel the need to replace it, a new Bosch 4.2LSU sensor is $85 from AEM but I've seen them for less on Amazon. Trust me when I say I'm loosing money on this.