- Irongut from the Ferryman at Port Ceto. I'm not sure whether I have to join the pirates to have a renewable source of Irongut. Does the Ferryman still go to Ceto if I get rid of the pirates?
- Jumping Bean. Not critical, but my build uses evasion so it'd be nice to have.
- Aegis. The wiki says this can be found as random loot, but if anyone knows a merchant that sells it please let me know.
- Toxic Gas Grenades. This might be the most painful thing to be missing. I got in the habit of spamming these in my last playthrough because of how cheap and OP they were. I'm sure I won't be able to spam them anymore, but just having a few for the hard fights would be great.
- I could use a source of rare bullets. Haven't found anyone that sells many of them.
- Taser. Can't seem to find anyone that sells these, which is too bad because they're absolutely fantastic.
Ferryman always goes to every location, even if everybody is wiped out.
Theres a few beans in the game but I'm not sure I've seen merchants sell them; you'll never find enough regardless.
I've seen Becket the drones merchant sell aegis, but not normally; looking at Eideins post maybe bean and aegis are just very rare sells from certain merchants.
You won't find special ammo from merchants (it can be found in loot, very rarely), but mercantile opens up a lot more jhp/w2c from certain people.
0 tasers to be found in the game.