[Value est.] 2003 1 kg + 1oz 1983-2006 silver pandas

Looking at the very first visible picture again, it seems that someone has gone to great length to create a 'poster' or 'cert' to advertise.

For those who can't read Chinese words. The four big Chinese characters loosely translates to "National Treasure of China". :/

 

that is the National treasure of China,knockoffs, fakes, copies,forgeries, ask Bill Gates , you can buy a copy of his latest programs for 20Y anywhere their,,,,,,,,,JUST A JOKE!!, I can take certain libertys my wife is Chinese

 

Thank you all for the candid advice.

Alas, after notifying the buyer, he weighed the 1kg coin himself and discovered it does not weigh 1kg!

He admitted that the set might be fake afterall. After a quick search on Alibaba I saw the exact same
2003 1kg knock-off cast in zinc and brass for 80 cents a piece: http://www.alibaba.com/product-gs/360826992/panda_souvenir_coin_gold.html

If it sound too good to be true...

Thanks all, will post more pictures if they become available.