Recipe not appearing in vendor "My Inventory" listing

[Techwright]

The recipe highlighted below, Gladiator's Armor: End/Rech [Level 25], as you can see, is not appearing in the "My Inventory" list of recipes that I can sell at the store.  It is the only one out of a previously large list of collected recipes that I could not access to sell.  I've closed and reopened both the recipe window and the vendor window, and the problem remains. 

 

[seebs]

Might be because it's a PvP recipe? They may not be vendable. They're also usually worth a lot on the market, I note.

[srmalloy]

IIRC, neither PvP nor Very Rare recipes are able to be sold to a vendor, which prevents you from accidentally selling a recipe that is worth several orders of magnitude more than what a vendor would pay.