This site offers many payment options for the customer - Secure card transaction, Cheque, Paypal and Google checkout.
There are many options for the customer to choose from, different posting addresses, verses choices, their own wording etc.
Basically, this means that the variations availanble are many. Perfect for the more complex product.
It also has a nice popup code that darkens the whole page so that the customer can concentrate on the image, neat :-)
Full back end with customer and order details.