Just checked a few markets:
Juneau-Seattle on a "G" fare - exit rows were blocked, 737-900. Premium seat was $29.
Anchorage - Seattle on a "K" fare - exit rows also blocked,737-800 Premium seat was $39
LAX - HNL - all exits/bh are premium, $99. A320
SFO-DCA - exit rows blocked, premium cabin seats are $129 - A321