Here's one for the collection, first time I have seen one up for sale. ebay Item number: 220980987517
http://www.ebay.com.au/itm/1983-Chi...a-Cameo-Zero-PF70-Most-Key-Date-/120874828711 http://www.ebay.com.au/itm/China-19...lver-Proof-Panda-Set-NGC-PF69UC-/350541995536 & http://www.rarecoincollector.net/index.php?main_page=product_info&cPath=97_98&products_id=8856
The MS69 set is one to drool over, if I had a bucket full of cash I'd be seriously considering them, amazing investment potential. Argentum, cameo as described in wikipedia: "In numismatics, cameo refers to a proof coin that has frosted lettering and features, providing attractive contrast with the mirrored fields of the coin. The terms "deep cameo" and "ultra cameo" describe cameo coins having the boldest, most attractive contrast." Pretty much covers it.
I buy for him (prcnumismatics) and allways the coins are gorgeus. But i think the auction go for 5000 or 6000. Its outside my price league :-(