Oh no, I don't mind about it. If anything raises any flag, we should discuss about it.
There's a section on custom magic items, and when you get multiple effects from a single item.
SRD:
"Multiple Similar Abilities: For items with multiple similar abilities that don’t take up space on a character’s body use the following formula: Calculate the price of the single most costly ability, then add 75% of the value of the next most costly ability, plus one-half the value of any other abilities.
So, I thought
"1st +2 skill should be 400. Second one should be 75% of 400, and rest of them should be one-half of 400." That was my reasoning. I'm not particularly adept with custom magic item thing, and quite frankly, I think the system is messed up anyways (I think they'll ditch it in 4th edition)
Also, remember, you *can* pick up non-class skills. It's just that you have to pay arms and legs if you want to raise'em...
One possibility I considered to changing the item was to change it to a set of 10 skills. This character is supposed to go Wizard 5/Harper Mage 5/Harper Master 10. To qualify those two Prestige Classes (Harper Mage and Harper Master), he needs 10 skills. So, at the end this character will likely to end up with a set of 10 skills. I thought it'd be nice if the item gave bonus to those 10.
Fido ignored my suggestion (I think he was too lazy to keep track of such things :P), and as Zyphen said, 8-10 skills are pretty much all we care use anyways, so I didn't worry too much about it.
-K