If you want to buy something specific, such as an antique dinner plate, you will have more options online than at a local mall.
You might not even be able find what you are looking for at a physical antique store.
If you own a store, you can offer a sale to draw customers to your place of business, but every other store is doing the same thing. Today, shoppers check online for discounts and deals. They search for the store with the best sale and go there.
However, remember that when you are building your E-commerce site, you want to work with companies who understand the industry as you definitely don’t want a website that will crash.