Material costs can vary by tier and location. They can also be limited in supply. Reference the crafting page and consult with your sector mod to figure out prices before purchasing. One purchase is typically enough to make one item.

Material	Tier	Cost (Zeni)	Location	Description
Steel	2	Free	Anywhere	Generic as it gets
Carbon Fiber	3	250	Anywhere	Strong and durable, until it cracks anyways.
Nanotech Fibers	4	500	Tech Planets	Difficult to manufacture but well worth the effort.
Draconic Scales	5	810	Magical Planets	Scales from an elder dragon. Difficult to obtain and even more difficult to craft with.
Adamantium	6	2430	Desolate Planets	Incredibly difficult to find and often surrounded by danger.