For a start - This is the price graph I'm going with here.

1Ce : 100 Cr (Just for better comparison, End prices are a little lower.)

Metal:..........|.......Ce.......|.......Cr.......|
Weapon.......|.......20.......|......2000.....|
Scrap...........|......40........|......4000....|
Reclaimed....|......120......|....12.000...|
Refined.........|......360......|....36.000...|
Key ≈ ..........|......900......|....90.000...|

And here are the prices, remember I want Metal and Keys, the Cr numbers are just for comparison :]

Golden Laurel ≈ 150.000 Cr / 4 ref
Shogun Helm ≈ 220.000 Cr / 6 ref
Medieval Helm ≈ 100.000 Cr / 2.66 ref
Imperial Tricorne ≈ 200.000 Cr / 5.66 ref

Note that I might take 1 or 2 scraps below these prices :)

Steam Name is DoctorX !!