I went to the banker and went to buy bank to see how much one costs but when i did that i saw shared bank option. what does that mean? i dont think you can share items with other people so i dont know what its for. i clicked it but when i did a wagu wagu machine page popped up on the screen and there was an item for i think 99 cash points.

I think (not for sure) that the "shared bank" allows you to share items between your characters via the bank. You have to have a special item from the cash shop to use it and i believe it is temporary.

yes.. the share bank has 16 slots, and has duration from 7 - 90 days.

also its the only way that you can share items between servers

no. u cant shared any items at different server. this only for 1 server. so u dont need sending any items via mail to other ur chars.

It also works for servers, that is how my friend got all his dogis from server 1 to server 2.
Unless its something else he used.

would it work with say binded brown skill books or binded u60s?

The question is, does it work for BINDED items at all?

BTW: Epic signature Cacalli.