Search displaying the cheapest buy it now Gold American Eagles $50 1oz coins on Ebay. Check back or refresh this page often. Reasonable priced 1oz Gold Eagles pop-up frequently and every once in a while a bargain is posted. I would recommend buying from sellers who have sold gold or other expensive items and received positive feedback for it. 

Ebay now has Paypal buyer protection for nearly all items listed from US sellers on Ebay. The item is covered in full up to the purchase amount. To prevent fraud Ebay will sometimes restrict new sellers from withdrawing funds for three weeks from their Paypal account once the buyer pays them. The restriction is removed when the three week period expires or the buyer leaves positive feed back. You can charge the purchase to your credit card for an added layer of security.