I dont think that someone who had a painted U2 would only try and sell it for $150... just sayin... Second, some leagues if the knob sticker is not there, its considered altered.... some umps dont know a knob sticker from a knob kuff and as long as they see SOEMTHING they are happy... so I could see the sticker just being swapped out...
without pics its impossible to tell.... but for $150 chances are its just a F98 with a different sticker