The procedure to special order one of my mathematical figures generally takes the following steps, although the exact procedure may vary somewhat. Remember that this is a custom-made figure, and I want to be sure all questions and concerns are handled before the figure is produced and/or shipped. My preferred communication method is email to firstname.lastname@example.org; thus I have a record of all the communication and there is much less opportunity for misunderstandings.
My work may only involve about one transactions per month, and I therefore choose to NOT handle credit cards, or similar payment methods. You may remit sums to me via check, money order, or a PayPal account. My PayPal account is email@example.com.