You definitely need to fix this up. You have stated the items are in no particular order but you barely get into why you pick them and what order. Add some more detail and make it better. Another thing to note is that you have no way to get your health back. Some lifesteal or health regen is a must on a squishy champion like Corki. I suggest getting Strength of Spirit in the defensive tree as you get good mana with Manamune and this gives you some good health regen without getting any items. Also starting out with a Sapphire Crystal gives you good health regen from it and allows you to get your Manamune faster.

Hextech is actually not a bad idea for Corki.

However... Lich Bane and Trinity Force on the same guide... Sheen effects don't stack =P

You have no Health, no resistances, nothing to save you from anything, just Valkrie. You don't even have Mercury treads or a GA to protect you at all.

Try again, keep Hextech and the trinity force idea. Rethink the rest of it xP

1) the description is not made for a random Corki. It's made for teamspirit and helping the others.
2) the items aren't meant to put in any order it's up to what you think.
3) the build is expensive because Corki can afford it, i'm sorry for you, if you can't farm.
4) it's easy to quote on a build of you haven't got one yourself and probably you even didn't try it.
5) if you expect early game kills, don't play Corki he's a carry.

Conclusion:

You're comment is worthless. Criticizing other people is lame.
This is not THE BUILD but if it doesn't match you you shouldn't comment it and especially don't rate it.

Thank you!

the discription sux, u put the items not in any order, the build is bad and super expensive... sry u gotta work on it it looks like u made this build in 10 min