What is the right coin value?

One of my silver coins is the 35 yuan , 1979 "Year of the Child" in PROOF, KM#8.
I looked up the value on NGC COIN VALUE under "China Peoples Republic and it says 7000$us in PROOF.
At ma-shops.de this coin is for sale for 1998,00 EURO in ST,
on ebay de. this coin is for sale for 478 EURO,
on ebay.com the coin is sold for 429 EURO in PP,
WIKIPEDIA tells you PP grading is the same as PROOF.
Very confusing , What are you thinking about the coin value?
Thanks for any help.

The value is best determined by actual sale, rather than catalogues or wishes of the seller alone, like the one from ma-shops you mentioned.
You can check on eBay "sold listings" for this coin in Proof. The highest prices are for coins certified by NGC or other third party grading companies. Coins not certified sold between US$ 300 and US$ 500, depending on the advertising (quality of images, etc) and luck of the seller.   

Citeer: AndreyThe value is best determined by actual sale, rather than catalogues or wishes of the seller alone, like the one from ma-shops you mentioned.
You can check on eBay "sold listings" for this coin in Proof. The highest prices are for coins certified by NGC or other third party grading companies. Coins not certified sold between US$ 300 and US$ 500, depending on the advertising (quality of images, etc) and luck of the seller.

Thanks Andrey
The best would be then to get the coin certified By NGC ?

I have never certified my coins, but I know that it is not cheap, especially if it is only one coin. You can check out their fees on NGC website. It is also important that the coin submitted for certification was not cleaned or, in case of Proof coins, damaged by scratches, hairlines, fingerprints, etc. Getting your coin back without a high numeric grade (e.g. PF68, PF69) will not improve your chances of selling it for better profit than an uncertified coin.  

Citeer: AndreyI have never certified my coins, but I know that it is not cheap, especially if it is only one coin. You can check out their fees on NGC website. It is also important that the coin submitted for certification was not cleaned or, in case of Proof coins, damaged by scratches, hairlines, fingerprints, etc. Getting your coin back without a high numeric grade (e.g. PF68, PF69) will not improve your chances of selling it for better profit than an uncertified coin.

If I understand you right, I can save my money and leave the coins as it is? My PP coins was bought 30 years ago, never opened the coin case. The same are the ST coins{BU] what I have. That is one reason why my coin pictures look not so good. My coins was graded at this time from a professional coin dealer [Business] the German way. Polierte Platte, PP, and Stempelglanz ,st., Should I offer my coins as they was graded or should I go and use the American Standard grading what is very confusing like AU 50 to AU 58 than MS 60 to MS 70. I can not see any difference. This grading does not exist in Germany as I know.
Thanks for your time, Andrey

If I knew correct answers to all marketing questions I would have been very rich and busy counting my profits with no time for participation in Numista forum  
If you sell on American or Canadian eBay, it's better to include "Proof" in item's name, since not all prospective buyers would know what "PP" means. Don't use numeric grade indicators, unless the coin was graded by NGC or another recognized professional grading company. Try to make high quality pictures for your listing, even without taking the coin out of its capsule.

Citeer: AndreyIf I knew correct answers to all marketing questions I would have been very rich and busy counting my profits with no time for participation in Numista forum  
If you sell on American or Canadian eBay, it's better to include "Proof" in item's name, since not all prospective buyers would know what "PP" means. Don't use numeric grade indicators, unless the coin was graded by NGC or another recognized professional grading company. Try to make high quality pictures for your listing, even without taking the coin out of its capsule.

Thanks Andrey for the good advice.