Either the PB poster is using your bike to scam/fraud someone out of their hard earned,
or it's someone wanting to use a picture of the same bike in better condition than theirs to make it more attractive to buyers.
Seeing as they've just copied and pasted the spec list/description, it's safe to say it's the former.
I'd get in touch with PB and explain the deal and get them to pull the ad. Too Suss.