Look for “coin dealers” in your local area. Or jewelers or pawnshops if you don’t have an actual coin dealer.
If you deal with a pawnshop, don’t let them rip you off by giving you the “junk gold” price. A Maple Leaf is one troy ounce of pure fine gold. They should pay you the current spot price, minus a small percentage for their commission.
Time out. Cale em up and ask em first what they are charging for a maple leaf. Lots of dealers are charging spot plus a hefty markup due to the scarcity of bullion coins. They should pay spot plus a solid percentage of their markup as well.