Where can I buy Coins & Collectibles in New York City?

I'm curious to know, where exactly in New York City can I find a reputable source to purchase coins and collectibles? Are there any particular shops or markets that specialize in these types of items? Additionally, are there any online platforms or auction houses that serve the NYC area and offer a wide range of coins and collectibles? I'm looking for both rare and common pieces, and I'm interested in the best options for quality, authenticity, and pricing. Can you guide me towards the most reliable sources for purchasing coins and collectibles in the city?