I think i have been here when we went to Akihabara. We only have 8 hours because it is only a 1 day trip, or we will miss the last train. My comment is simply "TOYS OVERLOAD". I only have about 20,000 yen at that time (about 250aud approx). I immediately saw a Daimos for 8,000 yen but just passed through it, never thought it was really cheap that time. Also been through a TFs section but not yet much of a fan also then. At that moment i only collect Gundams and anime figures. When i have another chance to go back there i will make sure i will bring my credit card

Regarding KOs in Japan...please be aware that most second hand stuff are through buy and sell. specialty toy shops usually will buy a 500 yen toy and sell it for 2000 yen. So if the staff is not aware of what is KO or fake they may just pass it as original. Although honestly nowadays some are already aware but still just wanna make money. Buying in Japan does not always mean you are certain you are buying an original. Items from China are now as popular there as anywhere in the world.