Currently on vanilla, there is a bug where the bot fails to sell items to innkeepers, but buys perfectly fine.
To clarify - HumanMasterPlugin ONLY forces ToTown state and puts the correct vendor in the database. It does NOT do any of the buying/selling.
wRobot fails to sell items at Innkeepers. I noticed right after, it went to repair and also failed to sell items at the repair NPC.