First, we need to clarify which marketplace we are talking about. Gaming marketplace, general-purpose marketplace, sports marketplace? As you can see there are a lot of varieties. Consider a market mastodon like Amazon or Walmart. Of course, an ordinary person simply can not afford to create such a marketplace alone. According to experts on the development of the marketplace can be spent 972 hours at an investment of $ 48,600 Impressive amount? The more complex the marketplace, the more expensive it is. Designers, programmers, marketers, and lawyers are working in the marketplace. It is a very complex and challenging process. If you want to know more, I can advise you https://www.codica.com/blog/how-much-does-it-cost-to-build-marketplace-website it's very detailed.