Transferslot - Easily buy and sell side-projects
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Flippa - Flippa is a platform for trading websites.
DeskAlerts - Send alerts to any corporate device: PCs, phones, tablets, etc.
buysellwebsite - Created by two California attorneys, WebsiteBroker.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.