Worth buying a used 3T?

I would buy uses theoretically, so long as I had proof of functioning and was able to test the device in-person. And was promised my money back if something happened.

Buying used is great as long as you're safe about it! The 3T is awesome, so I don't blame you in the slightest for wanting to buy it. Let us know what you decide!
 
Over OP5? I would get the latest rather an year old device that you can no longer buy from OnePlus website.
 
Over OP5? I would get the latest rather an year old device that you can no longer buy from OnePlus website.
The latest device isn't always the best. The OP5 looks like iPhone clone and has potentially defective screen issue which OP won't even acknowledge. That's more than enough for some of us to prefer the 3T over 5.
 
The latest device isn't always the best. The OP5 looks like iPhone clone and has potentially defective screen issue which OP won't even acknowledge. That's more than enough for some of us to prefer the 3T over 5.

Sure, but my reply was directed towards the OP. Its up to the user to decide what they want really. I have no issues whatsoever in my OP5.