The owner, Teddy, buys huge quantities if he can get large discounts. He passes those on, which is why his case prices are so good. If he doesn't get a discount, he may keep the product but will price it at what he paid and if it doesn't move, he just stops carrying it.
He has a nearby warehouse much bigger than the store so he can take big orders, unlike most stores in NY that are cramped for space.
He caters to the customers in the nearby neighborhood, so he stocks what they buy, except that he won't buy distributor closeouts. But that's why you may not find very rare Burgundies or Barolos, for example.
And unlike 90% of the stores in NY and NJ, he actually keeps the temp cool in the summer. It's why his wife is always wearing a sweater in August.
They are not wine snobs at all - they are an unpretentious family that just happens to love wine. It's becoming my favorite store - no attitude, no phony posing, no attempt to be uber-sophisticated about wine.
And they offer great discounts on multiple bottle mix and match purchases.