Hypersmurf said:
Strictly speaking, it's a MW longsword that happens to be a broken Holy Avenger. The "component value" you mention couldn't be applied to crafting a +1 longsword of Speed out of it, for example.
A Holy Avenger normally costs 60,000gp and 4,800xp to craft. You could restore this one for 30,000gp and 2,400xp.
-Hyp.
Yes, I agree fully. The material components needed to create a holy avenger would be different from those needed to create a longsword of Speed - a Solar's feather vs Quickling's blood, for instance. The DMG doesn't bother listing what the components for items actually are (which is strange considering how the PHB spells have them all listed), which is mildly annoying but only in a flavour way. I have the 'Eye of Newt' series from old White Dwarfs, and I can use that, and the attributes tables from the 1e DMG, if I want good ideas for material components.
I'm not sure if the rules support 'half cost & half xp' (have to check), but that's basically what I'll use should it ever come up!
Exception: recharging a wand costs full xp for the charge, but no material component cost, unless the spell itself requires valuable material components.