Pictures? Paperwork or other proof of authenticity? Chain of owners. Traceable back to particular authorized Turning Point retailer? Smoothness? Condition?
Pics added which should answer you question about condition and for pics.
I bought it from Throw-yoyo.co.uk (which I am a team member of) if that answers any of those questions.
I am the only person who has owned this. It kills me to sell it, I used it at UK Nationals 2011 and David Molnar borrowed it for his freestyle in the open division but I have always been the owner of this yoyo.
Here it is with me using it which should answer your question about play:
He only has one feedback on here but it is from me and he has a good amount of feedback on other forums as well. He will not sell you a fake positron, legit trader for sure.