Mark Knopfler usually keeps a low profile in public. Yet, the former Dire Straits frontman never fails to cause a buzz when a live gig or event is on the cards. The same was true in February, when 120 of his guitars were auctioned at Christie’s in London and fetched more than $10 million. Naturally, Knopfler did not part with all of his precious guitars as many still feature on his brand-new album “One Deep River” and some new guitars as well. His last album “Down The Road Wherever” was released in 2018, and his last concert was four and a half years ago. Although Knopfler, 74, has been yearni…