Verizon may be instituting a rare price slash on a current-generation iPhone if a sighting is accurate. A screen cap showing what appears to be a hint as to a Verizon site redesign shows the 16GB iPhone 4 dropping to $151 on a contract. The HTC Thunderbolt could see an even greater leap and go from its contract price to free if VZBuzz is correct, although it would officially start at a higher $300 versus today's $250.