I’m, personally, reluctant to back signing Grealish and certainly for over £100m. However...
It’s not “a scam”:
a. Grealish is English.
b. Grealish is nearly 2 years younger than Mahrez was.
c. Mahrez had been seriously agitating for a move for like a year/18 months before we signed him, Grealish hasn’t.
d. Grealish is on a longer contract than Mahrez was.
e. 3 years ago Mahrez was our record signing. Inflation, rapid as it is in football, has happened over the last 3 years in spite of Covid-19. Mahrez would have cost more today.
And in response to the rest, Grealish’s best attribute may be dribbling but he has a fantastic delivery, work rate, and he seems a decent finisher.
Finally, I don’t actually believe City will spend over £100M on Grealish and if a deal does get done I’m sure you would probably be less outraged at the transfer (my guess £70m-£90m).