Offer him Nevercold brass
From Fallen London Wiki
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From: Any old iron
It's worth it to see what he has in stock.
Unlocked with 
50 x Nevercold Brass Sliver
Success
Interrupted trade
[…] he pulls out a bag and spreads it open. It contains broken parts of […] a clockwork toy. […] a scurrying shape […] grabs one of the larger pieces […]. A rat! It disappears into a gutter.
[…] 'Not again.' He hands you some glim instead.[Find the rest of the story at https://www.fallenlondon.com]
You've lost 50 x Nevercold Brass Sliver
Playing with Broken Toys is increasing… (+1 CP)
You've gained 50 x Shard of Glim
