I personaly not recommend to judge scammer or not from the payment method. We are manufacturer, wholesaler and experience in my field. But we still take WU as sample order payment method. Not that we have not get paypal account, that fact is that our workmat in fiance deparment do know English and also know little about arrange paypal! How do they manage that?
To check if they are scammer there is many more other ways, such as method of contact. Is her/his email address from company? And range of his/her product.....etc