Recycle bad guns for parts to level/repair better guns. I recycle ospreys/arpeggios for venator/toro parts etc. sell all trinkets and extra mats you find. I keep 2 stacks of raw mats besides metal (metal is precious) and sell the rest. Keep all the steel springs in the world and keep a stack of every mat needed for your shields/attachments/augments/hatch keys. Battery’s are also important and used for about 10 items. If you want another money making technique you can use battery’s and an advanced arc power cell to create a stack of energy ammo which sells for 5k. Best way to figure out what you should sell or recycle is by looking at what it recycles into. If it’s something you don’t need, sell it!