When searching the internet for used books, I've found Abebooks to be one of the top resources. Recently I was hunting for a specific volume and found several listings for it.
Sometimes Abe sellers are stores, but sometimes they are individuals who are running a mom-and-pop level version of what Amazon was when it still sold only books. I always like to run down the list to see where the seller is located, because if it's within driving distance and it's an actual store, then I like to visit and see what else is on the shelves.
Imagine my surprise when I looked at one store and found it was listed in the very town where I now live (which is not exactly a hotbed of retail). And imagine my extended surprise when I looked up the store's listing and found that it's run from a house two blocks from the church where I serve.
So I sent the store an e-mail saying I'd love to buy their copy but could we waive the shipping charge because I work two blocks from their location. Didn't think anything more about it until the guy comes into the office this afternoon and introduces himself, carrying the book. We talked for 15 or 20 minutes about books and I got an invite to browse the store via its website and just knock on the door if I found something I liked.
Around the world or down the block. Sometimes I like this internet thing.