I was doing a Clockwork Arcade Run in an attempt to buy the Twisted Targe Recipe which is found at Depth 13. However, when I got there, Basil did not sell anything. This is the second time happening. The first time it happened, there was another person in the party and he could access what Basil was selling properly, but I couldn't.
Link: http://imgur.com/3ZyJFNf
You have to join a party at least two depths above the terminal for Basil to sell you anything.