I started doing provisioning on a lower character for my higher characters a week or two ago and bought probably 7 or so blue recipes from a guild store a day or two before the last patch. So I noticed in my search of all of my guild stores there were at least a few blue recipes in all of them and one store had probably 15 or more blue recipes after I had raided the cheaper ones.
Post-patch I just checked the guild stores last night and of the four stores I checked one had 2 blue recipes. Looks like there was a run on sales. I should also point out that one of the stores was selling blues above market for 1-3 k and those recipes were all gone as well when I checked.
As I understand it the drop for recipes has not changed the only change has been to swap some of the junk we used to pick up pre 0 g equipment (lockpicks or low level provisioning ingredients) for the 0 g equipment so there shouldn't really be a reason for a run on them. I'm glad I got the recipes when I did but I think we may see some price gouging soon until the market picks up again.
Just a warning for my fellow crafters.
PUG Life - the true test of your skill
18 characters, 17 max level, at least 1 Stam and 1 Mag of every class, 1 of every race and 1200+ CP
Tanked to Undaunted 9+ Mag and Stam of every class using Group Finder for 90+% of the Vet Dungeon runs