# How can market price of magic items be calculated from crafting price?

How would you calculate the market price of a magic item when only the crafting price is given? Some books like Magic Item Compendium give market prices, I know, but other books still have magic items not represented in that book, e.g. the Crown of White Ravens (and other related martial items) from Tome of Battle. Is there a standard way of making a purchase price for it as opposed to a crafting price, or is it more or less DM's call?

• Doesn't the DMG somewhere suggest 10x crafting price for a market price, if it's even on the market at all, but basically say, yeah, it's the DM's call? – SevenSidedDie Oct 30 '13 at 19:51
• @SevenSidedDie Close, but your factor is off by quite a lot. It’s typically 2×, not 10×. – KRyan Oct 30 '13 at 20:56
• @KRyan I may be thinking 3e rather than 3.5e. There was a significant culture shift between those two. – SevenSidedDie Oct 30 '13 at 20:57
• 3e was the same ratio in this respect as 3.5: 2x for magic items, and 3x for craft-skill items. If you never did much with the craft rules beyond scan them (very very few people ever do), you probably mixed it up with another ratio in those rules, wherein crafting by the day instead of by the week produces 1/10 of a week's progress per day. The only other place I know of where the 1:10 ratio shows up in crafting is in Airship engines, which if I remember right, cost 1/10 of market price per week spent making them (so final cost actually depends on time taken, and thus on skill modifier.) – Matthew Najmon Oct 31 '13 at 7:25
• @SevenSidedDie Am AFB, but I seem to recall a 10x rule for magic items in 1E or 2E when they used to give XP vaules in the magic items tables, but not \$ figures. IIRC, the sell value was nominally 10x the XP value. Perhaps that's what you're remembering? – Zimul8r Oct 31 '13 at 12:50