TPMS Question
A lot of scams on eBay.
If you purchased TPMS sensors on eBay that didn't need to be activated or woken, then they were previously used take-offs. Sensors are manufactured in dormant state for maximum shelf life. After that they wake when the wheel starts turning.
New valve stems for TPMS are very easy to come by. Most shops insist on replacing the valve stems with new tires even when they do not replace the TPMS sensor.
If you purchased TPMS sensors on eBay that didn't need to be activated or woken, then they were previously used take-offs. Sensors are manufactured in dormant state for maximum shelf life. After that they wake when the wheel starts turning.
New valve stems for TPMS are very easy to come by. Most shops insist on replacing the valve stems with new tires even when they do not replace the TPMS sensor.
I've had fantastic luck then, other than a few cell phones that weren't unlocked or showed up blacklisted when I used data I've had almost no problems from EBAY. I only buy from places that list free returns, so I didn't lose any money on the cell phones either. I figured worst case I was out the cost of swapping in the sensors and considering the price, I figured it was worth it.

