Autozone knock sensor vs eBay sensor??

[Bigred*]

So I'm pretty sure my knock sensor was fine, wasn't giving me any issues, but it cracked across the whole top and melted on the bottom and figured I'd replace while I'm building the engine.. Just went and picked one up at autozone, oem was $119.99 and the autozone branded one with lifetime warranty was $102.99
I thought that was a little over priced but had never replaced a knock sensor so I didn't know what the going price was on them till I got home and checked eBay.. I can get them for $6.99 on eBay with free shipping!
So I'm curious how these differ from the one I got and just how strong and durable they are.. Would the ebay one be a safe bet?
Or even just keep my oem stock one thats all cracked and melted but still working

[itsa300zx]

Read here on eBay knock sensors:

http://www.twinturbo.net/nissan/300zx/f ... nsors.html


Order from here:

http://www.twinturbo.net/nissan/300zx/f ... n-Z32.html

[Bigred*]

Wow good info, wasn't aware that this had been gone over so much, thanks!!