[I am new and have questions]

1 hour ago, DukeGr said:

Adena can be obtained by killing mobs.

but can't I sell the materials, arrows, etc. through adena?

[I am new and have questions]

I have returned to L2 after a long time. I've been playing with the quests that come up automatically and I've been collecting stuff. When I tried to sell it in the grosery, all the items gave me 0 adena. How is adena supposed to be obtained now? Thank you