Developing a marketplace is a very time-consuming process. You need to know the concept to determine the cost. The next step is to think about what part of the market your marketplace covers. If it is a small local store the price may be less, but if the platform such as Amazon price will be increased manifold plus you must remember that such a bulky platform requires a powerful server. If you have decided on the previous questions, proceed to the selection of the team to develop the marketplace. The development of the marketplace involves programmers, designers, marketers, and other professionals. Now let's talk about cost. According to experts, you can spend 972 hours to develop a marketplace with an investment of $48,600 - this is a phenomenal price, and it can vary, depending on the complexity of the marketplace. If you want to learn even more details, you can read
https://www.codica.com/blog/how-much-does-it-cost-to-build-marketplace-website