1929 Indian Head Gold Coin

Buyer BEWARE:  There are sellers on eBay that are selling reproduction coins of the 1929 $5.00 Indian Head Gold Eagle Coin, they are not disclosing in their listing that this is not an original US Mint coin.  One give away is they are saying coin is pure gold 24K, these coins are plated  only with a thin layer of  24K gold. These coins are only worth between 10.00 to 20.00.  The original US Mint coins are about 22K Gold. Ask questions from your seller about their coins, IS IT REAL ?.