Vendor Troubles

[The_Vyper]

I've followed this tutorial in order to create a new vendor (named Bob). I have the dialogue part working, but the objects in Bob's merchant container won't show up in the barter menu. Even more perplexing, when I sell things to Bob, they disappear from the barter menu when I choose "Accept". Not only that, but I don't get any caps for the sale. The dialogue works fine, but nothing in the Barter Menu works at all. Either the tutorial is incomplete, or I've missed something. So far I've:

1. Double-clicked on the container reference, set it to "persistent", and set AAVendorBob (Bob's editor ID) as the owner.

2. Double clicked on Bob's reference (which is in the same cell as the container) and selected the container ref in Bob's Merchant Container tab.

3. Given Bob an AI package with the "Offer Services" flag selected.

4. Created a custom Vendor class with all buy/sell flags checked.

5. Used one of the default Vendor classes, just to make sure the custom one wasn't messed up. It wasn't.

6. Tried a clean save, a new game entirely, and I've even scrapped the mod twice and remade it from scratch.

 

No matter what I try, Bob will not sell the items in his container, nor will he give me any caps for the items I sell to him. What in the name of Atom's Glow does it take to get a custom vendor to work?