It All Begins With a Handshake. In the complex and often puzzling world of buying and selling businesses, Allen & Young is the premier Southern Arizona business brokerage with the knowledge, integrity and confidentiality you demand and deserve. Our business ownership expertise and business brokerage experience spans over 30 years. Our business brokerage experience has been earned over almost a decade of helping small and large businesses with buying, selling, mergers and acquisitions, appraisals and consultation.