There’s no one answer to that question. The exact cost will depend on what system you choose, how many products you’re selling and what kind of features you require. Nonetheless, here are some ballpark figures as a rough guide:
For a small store selling no more than 100 products, if you use a free store builder or an inexpensive open-source solution with basic features, only accept domestic orders, and ship everything from your own office (or living room), you’ll probably pay a few thousand dollars.
For a customizable open-source solution that can handle a much larger product selection and comes with advanced features like a product configurator and an inventory management system, and if you’ve got to create new content, be prepared to pay at least $15,000.
And if you decide to go all out with proprietary software and choose to outsource content production, inventory management and logistics, you’ll need at least $60,000, although there’s really no upper limit for this kind of solution.