The former Celtic striker feels victory in the Champions League play-offs will have a positive impact in the transfer market.
Indeed, Hartson feels Leigh Griffiths has done well at Parkhead, while summer signing Nadir Ciftci is a work in progress, but the man who once netted prolifically for the Bhoys feels they are short of a 'top-class' striker who will guarantee goals.
He compared the situation to Celtic's recruitment of players that used to cost £6 million in Chis Sutton, Neil Lennon and, interestingly, himself.
Hartson is quoted as saying by the Record: "Players will see Celtic in the Champions League and that might sway them to play in Scotland.
"What the Champions League does is free up a bit more money if you want to go for the Hartsons, Suttons and Lennons - the players who used to cost £6m. They have bought Nadir Ciftci, who is a work in progress.
"Leigh Griffiths has done well but they will look to add a top-class striker who guarantees goals."
Do Celtic need a striker?
Hartson's comments are intriguing considering just how much praise Ciftci and Griffiths have received at Celtic in recent weeks. But, if anyone can pick out a striker who will 'guarantee goals' for Celtic, few have better experience in that area than Hartson.
When it comes to the Scottish Premiership, Celtic's current strike force could likely see them to the title at a canter. John Collins' recent comments about the divide between Scottish football and that of Europe, though, highlight the fact the Champions League group stages are where things get tough.