The Dragonstone is still typically a $15-18 wine (up from the $10-12 of early 2000s vintages, but so is everything). I see Grapes the Wine Company (Posner) has the 2010 for $13.xx (before discount), and a bunch of NY/NJ places have the 2011 for $13-15.
David B can correct me if I'm wrong, but the Skurnik/Theise collaboration stays the same.
Sancerre prices have gone up dramatically in last few years, but I think that predated the 50 Shades of Grey phenomenon (or at least my awareness of ths).
Sounds to me more like an overpriced shop with a line of patter.