when does it restock?

Whenever the staff decide to stock it. :) For a new item or a mass stock, it's usually announced in the news. Not every subsequent stock is announced, but people on the boards usually post about it then.

so it's sorta random?

ok thanks XD

It's very random ;)

I wonder how many users spend most of their day just sitting there refreshing, expecting it to restock any second....

Edited because I'm a dyslexic idiot.

Very random, and it usually goes weeks between restocks.