If you mean by money order, yes of course. The main downside is that they're slow. You may prefer a bank transfer: way faster, more secure and no need for a credit card.
Or you can use Paypal, even without a Paypal account or credit card. For example, in Italy there's a prepaid card that works like a Visa Electron, so it's widely used for online payments instead of real credit cards. I think prepaid cards like that exist in other countries, too.
More details on payment methods will be available on the new ecommerce website. Until then, please send me a private note so that I can answer in a more specific way.