CREATE TABLE table_name_73 (issue_price NUMBER, special_notes VARCHAR2, mintage VARCHAR2)

What is the average issue price with from Toronto maple leafs gift set, and a Mintage of 3527?
SELECT AVG(issue_price) FROM table_name_73 WHERE special_notes = "from toronto maple leafs gift set" AND mintage = "3527"
SELECT AVG("issue_price") FROM "table_name_73" WHERE "3527" = "mintage" AND "from toronto maple leafs gift set" = "special_notes"