you have to be getting
ebay points and when you have been using it you will get in on deals, I was given a 10% off. (or more exactly given 10% on my account to use later) then I found a deal from
APMEX (a reputable mint seller) and got 10% back off of the price which worked out to be $50 below spot... you just have to wait to use the 10% back until it squares, but if you know you buy off of
ebay regularly then it works out.... there are videos on youtube on how to do this.