if you use live search (microsoft's search engine).
Put in "gold coin" then click on ebay link that pops up for 8% cash back.
When ebay loads the gold coins put in gecko g540, or g201x, or g203V.
If there is a buy it now option, and you use paypal and sign up for bing cash back, you get the 8% paid back from microsoft.
So the G540 for $249.99 buy it now is only $229.99 + shipping,
after cash back - best deal anywhere.