[saalweachter]

The physical shopping radius for a specialty shop is also a lot larger than a generic store.

If you have the store to find mid-century burnished widgets at, people might regularly come from a hundred or more miles away when they really need just the right sort of widget, and when they do -- if your stock lives up to the hype -- they will tend to be big customers, buying a lot (since they weren't casually dropping in), being fairly price insensitive (since they have few alternatives for what they need), and repeat customers (since you seldom end up needing a specialty item once).

You might still need an online storefront, or you might take phone orders from your regulars, but the clientele of a specialty shop is radically different than the clientele of a generic shop, which relies more on people wandering by and which competes with ten other stores a mile away, and the big box store off the highway.