Ok can someone help me with this mod? Where do I get the treasure chest from in buy mode? I've been looking everywhere.

I believe it's the WA treasure chest the you get from buy debug (go into build/buy mode, then control+shift+C, then type in buydebug on)
It's in the first tab toward the bottom. Make sure you turn buy debug off before you go out of build/buy mode as it can mess up your game if you play for too long with it on.

@Veiledstar Ok so I got the treasure chest and placed in the elixir store. Then I added a tomato to it and tried the shop from inventory interaction and it still said empty. Do I need ani's Savier Seller modded register for it to work?

BTW thanks for the tip

Yes, you will need ani's Savvier Seller register for any store that sells stuff.

Ok I'll try with that but how come the interaction appears in every register? The consignment store gets the option too and world adv. markets also get the option but it doesn't work for those. No item appears.

The shop from inventory mod has nothing to do with the savvier seller mod. The mod doesn't work with elixir registers. For tomatoes to show up you'll need a food register.

I did try with a food register I'll try again. You are talking about world adv food register right?

Sorry, my mistake

I'm not sure if these pictures may help you at all, but this is the same mod, it's just no longer supported over at MTS, it's supported here. @chain perhaps we could add some pictures for the help they add? It seems to help explain a bit more (I can edit the page if I can add the pictures or more explanation if it would help).

@Skydome You can see that they show the different types of register for each type of item:
-Food register: Shows items of type dried food, plate serving, ingredient, cake, fish
- Book register: Shows items of type book
- Nectar register: Shows items of type nectar
- Consignment/general/pet/relic registers: show all items that don't fit into the other types defined.

http://modthesims.info/d/409607