There was mixed news for Fantasy Premier League managers awaiting the launch of FPL for the 2018/19 season.
Two premium forwards' prices fell while another's rose.
Aguero produced 21 goals and six assists in 22 starts to tally 169 FPL points last season.
His average of 6.8 points per match was more than any FPL forward.
In the first seven Gameweeks of 2018/19 Manchester City face all six of the teams promoted to the Premier League in the last two seasons.
Lukaku's price has dropped after he delivered 16 goals, seven assists and 161 points in his first season for Manchester United.
The Belgium international remains one of the most consistent forwards available to FPL managers.
He is a secure starter under Jose Mourinho and supplied a goal or an assist in 20 of his 33 Gameweek starts.
Managers eyeing Roberto Firmino will have to contend with a price rise for the Liverpool forward. From a price of £8.5m last season Firmino has increased to £9.5m for 2018/19.
The Brazilian totalled 181 points in 2017/18 to finish as the third top-scoring forward in FPL.
More than 4.6million FPL managers bought Firmino last season. Only Harry Kane, bought by 5.3million, was more popular.
The popularity of Firmino at £9.5m could be affected by the price of his team-mate Mohamed Salah. After a record-breaking points total, if Salah rises sharply in price, Firmino could be a big target again.
Eden Hazard will stay at £10.5m to remain one of FPL's most expensive midfielders.
That valuation reflects the Chelsea winger's consistency season-in, season-out. Hazard has supplied at least 170 FPL points in five of his six seasons.
Follow @OfficialFPL for more FPL price reveals.