Canada TD Bank sells silver bars and coins through TD Precious Metals, online and at select branches. You typically need a TD account, prices update with the market during the day, and the premium over spot on a 1 oz coin is usually higher than at a dedicated bullion dealer. Convenience and trust are the trade-off for the higher price.
Costco Canada periodically lists silver bars and coins online for members, often 10 oz or 100 oz bars from known refiners. Stock sells out quickly and appears irregularly. Premiums are often competitive, but there is no buyback — when you sell, you go to a dealer and accept their bid price.
Dedicated bullion dealers (online or in Toronto, Vancouver, Montreal and other cities) usually offer the lowest premiums over spot, especially on 10 oz, 100 oz and kilogram bars, and most run a buyback desk that pays a small discount under spot.
Whatever the source, compare the total price per ounce against the live spot price on this site before you buy. The difference is the premium — for silver it commonly runs from about 5% on large bars to 15% or more on single coins.
Investment-grade silver of at least 99.9% purity is generally zero-rated for GST/HST in Canada. Lower-purity items and collectibles are taxable, so a pre-1968 80% silver dollar can attract sales tax that a 99.99% Silver Maple Leaf does not.