You send in cash for your payment. Order's are not shipped COD though, so the payment will have to arrive before the product is shipped. When sending cash, it is best to always send it via registered mail so you can track and ensure it arrives without a problem. The Shop payment methods can be found here: http://shop.grasscity.com/shop/grasscity/payment.html?id=6Rp8JLpG
We have several users that only will use that to pay, it's a good service. Simliar to Paypal, but with less hassles and better service. I've never personally used them, but I have several friends that use the service and I've not heard any bad feedback about it, hope that helps!