Barter Meets Mercenary Shoppy

An Immortal says 'probably just bug board it' The intended functionality does not seem to work when bartering for pets. I tried lots of variants, but nothing gets the job done. This shopkeeper is Gratok, in the orc village. list Pets for sale: [25] 6250 - an ogre slave [21] 4410 - an orc slave [18] 3240 - a bugbear slave [15] 2250 - a one-eyed goblin warrior [12] 1440 - a goblin slave [ 5] 250 - a kobold slave wo You have 3 gold, 103 silver, and 58 copper, which is worth 5118 copper. You have 131439 experience and need 6161 more experience to gain a rank. (33.61% progress) in You are carrying: (Glowing) (Humming) the warlord's helmet You have ingested: Nothing. barter helmet for ogre Gratok tells you 'I don't have that item.' barter helmet for orc Gratok tells you 'I don't have that item.' barter helmet for bugbear Gratok tells you 'I don't have that item.' barter helmet for goblin Gratok tells you 'I don't have that item.'