There’s a recursive barter in the game at the moment involving the corp “Daydream Chems” and their outpost on Earth, と呼ばれる “AKK”. The AKK outpost accepts glass and acid, and one of the main rewards it gives you is poison ammunition which can be disassembled into more glass and acid.
ザ・ループ
ステップ 1: Acquire some acid. You can get some from the green acid vats that occasionally spawn in missions, or from dismantling acid weapons and ammunition. (you can also bring other stuff AKK wants for the initial trade, like plastic, organ containers, 血液バッグ, or poppy straws)
ステップ 2: Travel to Earth and visit the AKK outpost.
ステップ 3: Offer up all of the resources you brought with you.
ステップ 4: Hope you received some chemtrail ammunition. もしそうしていたら, dismantle it and feed the newly acquired glass and acid back into the vendor.
ステップ 5: Repeat step 4 until you get particularly unlucky and completely run out of acid and glass.
エクストラ
There’s probably a lot of other interactions just like this, but I haven’t discovered them yet. It’s best to just keep on the lookout for possible interactions between the input for a specific location and the loot table that the corp gives out as rewards.