Yes as an employee of Pangolin I would highly recommend that NOBODY purchase this, until the S/N is posted publicly on this thread preferably with a picture.
USB port being replaced sounds suspect considering the counterfeit issues and that being one of the main ways to identify counterfeit.
Not attacking seller, just being safe, not sorry. Please post picture of the unit showing the repair. I will advise publicly if this is legit unit or not. Tired of the headaches here!
Note that PANGOLIN no longer offers any warranty of any sort on this unit with admission of modification!
Sincerely,
Ryan Smith
ScannerMAX Mechanical Engineer
ryan {at} scannermax.com