Hello, I was trying to purchase an RS prop masters suit but when it comes to purchasing the user of the email is asking to be paid via a direct PayPal invoice rather than off their website. Is this a normal request when it comes to purchasing? I've never been asked to purchase something from a company via direct PayPal invoice. I've also never used PayPal. How would I ever confirm a purchase? Or show a receipt for what I purchased? Or review what I am trying to purchase?