The GSA Vendor Support Center (VSC) is an important GSA website for GSA contractors. It serves as a gateway to the quarterly GSA sales reporting site, e-Buy, GSA eLibrary, and GSA Advantage. It houses various guide such as Steps to Success, GSA's quarterly newsletter and other publications.
The only historical knock against the VSC is that it is disorganzied and the quality of information provided is simplistic. In recent times it has become better organzied and more useful for vendors.