To settle this, I sent it on to Craig Dack to see what he has to say about the bike.
Here's his reply and my initial email
Hi Craig,
Just a quick one for you. Is the following bike being offered up on eBay one of your old Peter Jackson bikes? The personalised engine ID, blue wheels and trick swingarm offer some clues but I figured you'd be the bloke who'd know better than most. I hope alls well.
Best wishes,
Firko
Hi Mate,
We have been testing all week and have just had a look at the banter, etc going about the my YZ…s
I still have the Peter Jackson bike in my workshop so it’s not stolen… All I can imaging it was one of my old bikes the team had sold at the end of our use. If you could let your reader know that it would be appreciated and thanks to all of them as well
Thank you for looking out for me.
Kind Regards
Dacka
So...from that it appears that it may indeed be a Peter Jackson team bike.