Since GW2 has no suggestions section I felt this is the most appropriate section to post this topic in as it is something that is happening in the game that is not meant to happen.
I don't know when it was allowed and/or when it was removed from being allowed but at some point Guild Wars 2 allowed multiple (realistically A LOT) of recipes to be placed on the trading post that as of today are Account Bound on Acquire. I've found that most of them are Chef recipes like Recipe Desert: Pile of Jacarandere & Recipe: Bowl of "Elon Red" & Recipe: Bowl of Lentil Soup. There are thousands of each of them currently on the Trading Post. You can click on one which brings up the window of how many you want to buy along with what price it will be for each of them. The thing is, it never allows you to actually BUY it because the window has this infinite "working" or "processing" circle that computers get when the computer is lagging to do something. Needless to say, this makes searching for recipes you want to buy very difficult as the Chef recipe page is probably 90% Account Bound on Acquire recipes that the game will not allow you to purchase from the Trading Post.
Either allow players to purchase these Account Bound on Acquire recipes that are currently on there while NOT allowing other recipes to be added, completely remove ALL of them Account Bound on Acquire recipes from the Trading Post since nobody can even buy them, or remove the Account Bound on Acquire flag on the recipes which would allow players to buy them from the Trading Post. I have gripes about things on the Trading Post but this is probably the one that is the most annoying of them.