-Dull copper, 1-2 mods 50 charges, 1000 or less. Usually I donate them to new or throw away
-shadow, 2 mods 45 charges, 1-5k, ok for throwaway stuff
-Copper, 2-3 mods 40 charges, 10-20k, "poor man's bronze hammers", good for throwaway armor IMO. Can make stuff as good as bronze hammers but you are going to use more ingots to bang out worthwhile stuff.
-Bronze, 3 mods 35 charges, run 250-400k, good hammers, cost effective, can get some very nice things out of them
-Gold, 3-4 mods, 30 charges, last few I sold went for 2M, good hammers.
-Agapite, 4 mods 25 charges, 5M, great hammers can make some very very good stuff
-Verite, 4-5 mods 20 charges, 10M+, only 3 Lbods reward this hammer
-Valorite, 5 mods all 85-100% intensity 15 charges, mother of all runics.
I forget intensity minimums for them all, they are in pub 51 or 52 patch notes, but the ranges on all hammers are X-100% for every hammer type.
edit: also should be noted bronze is highest hammer that can be attained from a small bod. gold and up all are from large bods only, verite and valorite only from exceptional plate verite and valorite (7 piece) larges.
Hence the price jump of bronze to gold and higher