The cost of a custom ecommerce solution based on Shopify will vary depending on the specific requirements of the project. Some factors that will affect the price include the number of products, the complexity of the design, the number of features, and the amount of support needed.
If you are looking for a general idea of cost, you can expect to pay $5000-$10,000 for a basic custom solution, and $10,000-$20,000 for a more complex solution. These prices are just estimates, and the actual cost will depend on the specific project.
If you need help pricing out a custom ecommerce solution based on Shopify, you can contact a Shopify Expert. They will be able to give you a more accurate quote based on your specific needs.