I've built out something like 700 sites with PA/DA over 40 (on both) and CF/TF over 20 accumulated over the last 2.5 years. Within the last 6 months, it's become more and more difficult to get them for close to the registration prices. In fact, regardless of the quality of the domain, it's quite common to see sites with mediocre link profiles, but PAs over 50 going for $400-500 each (not even going to get into how stupid this is from an ROI perspective). Clean link profiles often going into the thousands. I conservatively estimate that my network, which cost less than $4000 to build, is now worth into the $100,000+ range. Where's the end game in this gold rush?