I wonder does anyone has an experience any WP Marketplace solution? Can suggest one and explain why?
You mean you want to start your own WordPress-powered marketplace?
If digital products, check out Easy Digital Downloads + the Digital Marketplace Bundle + the Checkout theme by Array.
If physical products, check out WooCommerce + one of these multi-vendor addons.
Yes. I want to build my own marketplace for digital products. Actually not only for digital products but also for service selling.
Okay, Easy Digital Downloads also has a Downloads as Services addon. I'd definitely go that route.