IowaRetail Quantum closes sale of single-tenant Hy-Vee in Davenport September 8, 2018 Share on Facebook Share on Twitter Share on LinkedIn Share via email Quantum Real Estate Advisors brokered the sale of a single-tenent Hy-Vee gas station at 3850 Elmore Ave. in Davenport, Iowa. The property sold for $855,000. The buyer was a private real estate investor based in Davenport. The seller was a premium acquisition and development company from southern California. Chad Firsel, president of Quantum Real Estate Advisors, represented the seller and the buyer.