Celtic appear to be getting everything right with regards to their transfer dealings under Ange Postecoglou, with the 57-year-old appearing to find hidden gem after hidden gem all for relative bargain fees.

Such a structured and successful approach to the market is a far cry from the seemingly scattergun technique under former boss Neil Lennon, with the Northern Irishman having made notable costly errors with regards to incomings in his second stint in charge.

This summer has laid bare those blunders following the exits of a handful of Lennon additions, with £4.5m man Albian Ajeti having been shipped off to Sturm Graz on loan, while defender Christopher Jullien has returned to France to join Montpellier for a fraction of the cost of his original £7m fee.

Completing that terrible triumvirate is goalkeeper Vasilis Barkas, with the Greek international joining FC Utrecht on a season-long loan deal, just two years on from his arrival at Parkhead.

Signed in the same summer as the aforementioned Ajeti - as well as the likes of Diego Laxalt and loan flop Shane Duffy - the-6 foot-5 menace was plucked from AEK Athens for a hefty £5m fee, having been tasked with the challenge of replacing the departed Craig Gordon.

While the latter man has since gone on to shine at current club Hearts and for his country - proving the Hoops wrong in the process - it has been a truly miserable spell in Glasgow for Barkas thus far, with the 28-year-old having made just 24 appearances over the last two years.

Dubbed "awful" by pundit Frank McAvennie, the £10.5k-per-week dud quickly faded from view in his debut campaign having been ousted by backup 'keeper Scott Bain, before going on to make just two appearances under Postecoglou last season.

One of those rare outings proved just why the Netherlands-born dud's time at the club has been something of a "disaster" - in the words of journalist Pete O'Rourke - as he made a typical blunder in the 1-1 draw with FC Midtjylland in Champions League qualifying.

Having been left to rot on the bench following the arrival of Joe Hart last summer, Barkas has finally managed to secure an escape with his recent temporary exit, albeit with his time with the Old Firm outfit potentially not yet over with his current deal set to run until 2024.

Any hopes of recouping a sizeable for the player appear slim, however, particularly with the 13-cap man currently valued at just £900k - as per Transfermarkt - ensuring he is now worth 72% less than his initial fee.

As Tam McManus stated, the expensive flop has simply been a "waste of money" for those at Celtic Park.