Okay, folks, I've updated everything again, and I think this is pretty much a final version. The DCs, as you will probably notice, have been boosted quite a bit, especially at the higher levels; I might drop them by 5, but I think they're pretty close to where they should be otherwise.
It's rather a good thing that I went over the numbers over the weekend, because I found an error in my calculations for weapons and armor, which has been corrected. The tables for weapons, armor, and other items that grant just bonuses is below the main table.
I added some extra notes in the Discussion section, and updated the old notes. I'll be posting my stuff on the graded multipliers tomorrow, after I get it cleaned up and some notes written.
And, as an added bonus, here are some of my notes on how I came up with the numbers in the first place.
For Craft DC, add the minimum and maximum prices for the range* and divide by 5, then add it to 20 (round up). For items that apply the epic multiplier, multiply the modifier** by 5,000 and divide the total by that number, then add to 20.
*For example, medium wondrous items go from 7,500 gp to 27,500 gp (I rounded up). Add those (35,000) and divide by 5,000 (7), and add that to 20 - voila, Craft DC.
**The modifier, in this case, is the graded multiplier. For instance, a +7 weapon has a x1.5 multiplier, and +8 has x2; you use the lower multiplier, so the price range for +7 to +8 weapons is divided by 5,000 * 1.5 = 7,500.
For crafting time, add the minimum and maximum prices for the range and divide by 3,000 (round up). For weapons/armor, divide by 5,000. For high-end items, divide by 6,000. For epic items, divide by 10,000*. If the combined price (for items that use the graded
multiplier) is over 1 million, divide by 10,000 gp instead.**
*I came up with the base time for epic items by determining the highest time for non-epic items (90 days) and adding 10, thus ensuring that the time for any epic item would always be more than any non-epic item.
**For instance: the combined price range for +9 to +10 weapons is 1,286,000 gp. Since it's over 1 million, you divided it by 10,000 instead of 5,000 to get the time.