Flippa - Flippa is a platform for trading websites.
AcquireBase - A marketplace for buying and selling side projects & SaaS apps for free. Absolutely 0% commission on successful sales. No paywall for unlocking offers.
Cocreate Idea - Cocreate Idea is a platform for ideas, our mission is to help you grow your idea to the next level...
Transferslot - Easily buy and sell side-projects
buysellwebsite - Created by two California attorneys, WebsiteBroker.
Borderline.biz - Borderline is a marketplace for side projects. Buy & sell web applications, big or small, profitable or not, entirely for free.