Flippa - Flippa is a platform for trading websites.
1Kprojects - Neglected side projects for less than $1000.
Transferslot - Easily buy and sell side-projects
SideProjectors - Marketplace to buy and sell side projects
buysellwebsite - Created by two California attorneys, WebsiteBroker.
AcquireBase - A marketplace for buying and selling side projects & SaaS apps for free. Absolutely 0% commission on successful sales. No paywall for unlocking offers.