Whether you are buying a Mac or paying for a repair, upgrade or parts. Payment is required before the computer (or parts) are shipped to you.
I always provide an invoice and the invoice date becomes the commensement date for warranty purposes.
I do not usually request a deposit but I reserve the right to in the case of more expensive equipment sales.
My preferred method of payment would be by direct bank transfer and I wil lprovide my bank details at the time that I present the invoice for payment.
If you prefer, you can pay by PayPal and I can provide a PayPal invoice in advance that you can pay or I can simply provide you with my PayPal email address and you can send payment that way.
Please feel free to contact me if you have any questions.