The 24-year-old forward is set to be confirmed as an Arsenal player within the next 48 hours.
And despite the Gunners having to contend with a limited budget this summer, they are still set to smash their transfer record.
Pierre-Emerick Aubameyang is Arsenal’s current most expensive ever signing at £57m.
But that deal with Borussia Dortmund, struck back in January 2018, it on course to be usurped imminently.
Pepe will pen a five-year contract at the Emirates Stadium.
And Arsenal supporters have made it clear to Sanllehi they are thankful for his work behind the scenes.
Unai Emery’s side failed to qualify for the Champions League and that ultimately put a dent in their plans to spend big this summer.
However, the Gunners have managed to agree a deal with Lille which is still within budget as they spread payments out over instalments.
READ MORE: Arsenal feature in our live Transfer News blog
“It really is Raul Sanllehi FC”
It means Ligue 1 goalscoring talent Pepe will come in and strengthen the team further going forward.
Supporters are delighted with the deal, with Arsenal having seen off competition from a host of top European clubs such as Napoli, Liverpool and Manchester United.
And many have sent messages to transfer chief Sanllehi, outlining their gratitude on social media.
One Arsenal fan posted on Twitter: “It really is Raul Sanllehi FC”.
Another added: “Are we in the upside down ?!?! @Arsenal sign Nicholas Pepe for £72M !!!! Unai Emery you wizard !!!! Am I dreaming ?!?! Build Raul Sanllehi a statue NOW !!”
A third said: “He pays when he wants, he pays when he waaants. Raul Sanllehi, he pays when he wants. #Arsenal #InstallmentsFC”.
“OMG……….#raulsanllehi you absolute monster,” a fourth fan said.
One Arsenal supporter summarised: “Out of 45m, we got, Gabriel Martinelli, Saliba, Pepe is almost here, Tierney is almost here. Arsenal should build a statue for Raul Sanllehi. We are almost ready for the season..”
Another said: “can I just say how much of a G Raul Sanllehi is? I love everything about that guy. All those people saying he’s all talk – you know yourselves.”
A final Gunners fan posted: “Raul Sanllehi reminds me of David Dein, the kind of person we were missing for so long. And he has just started at Arsenal”.