After Saturday's brace for West Brom, though, there are plenty of Newcastle supporters fearing Berahino's pricetag will have increased.
That said, an equal amount of Newcastle fans feel far stronger about the club making a move for the young forward. This was only Peterborough United - with all respect, a League One team - but it's still a side West Brom couldn't actually beat.
Berahino, however, managed to score twice against them, despite being severely short of game time and match fitness.
Here's how Newcastle fans reacted to the West Brom man's two-goal FA Cup haul on Twitter...
Those two goals from Berahino have just put the nail in the coffin of us being able to buy him. I hope I eat my words come Monday #nufc— Bob Snee (@VB_Bobbin) January 30, 2016
The only explanation I can come up with as to why #NUFC have left it this late to try get a striker is that they were waiting for Berahino..— NUFC 360 (@NUFC360) January 30, 2016
Got a feeling Berahino has played his last game for west brom today. Hopefully it's us he leaves for though. #nufc— David Gill (@davidgill1985) January 30, 2016
Stick my neck out and say Berahino will sign on Monday, for less than £18m aswel #nufc— Graeme Fazakerley (@GraemeFaz) January 30, 2016
Berahino not played in weeks and nocking them in still .... #NUFC buy this guy!!!!— Connor Jacques (@jafffacakes) January 30, 2016