I dont buy from seed banks but I would have to say if accepted the best way to pay is Cashiers Check or Money Order to keep discreet- I pay cash from a good friend $5-15$ per depending on quality
super great way! if the site has a phone number and takes credit cards you can pick up an American Express gift card from 7-11 or Circle K using cash! Use it just like a credit card. pay them faster to get your goods quicker.