All you have to do with Google Checkout is log into the Google checkout account and email the buyer an invoice containing the exact amount that they owe. The buyer can then use the email invoice to pay with their credit/debit card. So just put a note in your listings letting the buyers know that you accept credit/debit cards as well as Pay Pal. I don't think you can accept Checks and Money Orders anymore. Ebay/PayPal has banned mail in payments as too risky; as if Pay Pal isn't the main reason for most of the money being lost by sellers.
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