Portsmouth boss Harry Redknapp is believed to be still trying to re-sign Ayegbeni Yakubu from Middlesbrough.
Pompey have sounded out Boro about bringing £12million-rated Yakubu back to the club where he was a 20-goals-a-season man in two Premier League campaigns until his £7million move to the north-east two years ago.
Despite Nigerian star Kanu's willingness now to sign a new one-year contract with additional options, Redknapp is still keen to add another striker to his squad despite already buying David Nugent and John Utaka for a combined £13million.
And those deals are the reason that Yakubu's agent Barry Silkman believes the player will be too expensive to complete an all-Nigerian front-line trio with Kanu and Utaka at Fratton Park.
Silkman told the Portsmouth News: "Yakubu will not come cheap. I honestly believe Pompey don't have the money to pay for him.
"Maybe Portsmouth thought the price would go down the closer it got to the (start of the) season. But Middlesbrough will look at the money Portsmouth have spent for David Nugent, Sulley Muntari (£7.2million) and John Utaka and think Yakubu is worth more."