I will give verified unique gsa ser list of 62,000
I run GSA every days for my link building service, i got this 62.000 verified list from 6 months ago. This link are verified link and grow every days. This moment it reach more than 100.000
This GSA SER List coming from all kind of link in GSA SER.
The file is in .sl (site list file)
What you want to do is upload it into the GSA using tools inside Option - Advanced
I hope this list will boost your rank.