user: Question: What is the average issue price with From Toronto Maple Leafs Gift Set, and a Mintage of 3527?
Columns: ['Year', 'Theme', 'Artist', 'Mintage', 'Issue price', 'Special notes']
Types: ['real', 'text', 'text', 'text', 'real', 'text']
Sample row: [2006.0, 'Montreal Canadiens', 'N/A', 'N/A', 24.95, 'From Montreal Canadiens Gift Set']
SQL:

assistant: SELECT AVG("Issue price") FROM "Table" WHERE "Special notes" = 'From Toronto Maple Leafs Gift Set' AND "Mintage" = '3527';