About 25% of all BODs can be bribed up to a Copper Hammer.
You sure about that? Last I checked, 50% of the BODs are weapons, and there's only 4 Weapons LBODs that can be taken high enough to get POF.
anywhere from 25% (GM) to 5% (Legendary Smith) are Iron armor, and that would take a LOT of bribes.
The last 25-45% are the colored armor & non combinables (near even split - 13 armor smalls, 12 non-combinables) and it takes one of the following to have a chance for a copper runic
Copper Runic Hammer
10 - Normal - Ringmail Large - Agapite
10 - Normal - Chainmail Large - Bronze
10 - Normal - Platemail Large - Shadow Iron
10 - Exceptional - Small - Agapite
10 - Exceptional - Ringmail Large - Shadow Iron
20 - Normal - Ringmail Large - Gold
20 - Normal - Chainmail Large - Copper
20 - Normal - Platemail Large - Dull Copper
20 - Exceptional - Small - Gold
20 - Exceptional - Ringmail Large - Dull Copper
20 - Exceptional - Platemail Large - Iron
Copper Runic Hammer (30% Chance)
15 - Normal - Ringmail Large - Agapite
15 - Normal - Chainmail Large - Bronze
15 - Normal - Platemail Large - Shadow Iron
15 - Exceptional - Small - Agapite
15 - Exceptional - Ringmail Large - Shadow Iron
That's a lot of bribes, and a lot of legwork finding smiths that aren't bribed out.