Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. §1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Ritchie Bros. Auctioneers Incorporated (the "Company") on Form 10-Q for the period ended September 30, 2019, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Sharon R. Driscoll,  Co- Chief Executive Officer and Chief Financial Officer, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)   The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)   The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	November 7, 2019
/s/ Sharon R. Driscoll
Sharon R. Driscoll
Co- Chief Executive Officer and Chief Financial Officer