I'll take a credit card for delivery and quality assurance over PayPal any day of the week, plus I don't need to open up more bank accounts to isolate my purchasing methods for security against PayPal. Yea, person to person stuff can work out better using PayPal but there's still quite a risk of getting ripped, and there are many threads in various RC forums to support that, and PayPal wasn't able to do anything after accounts had been closed. I've never had an issue with a CC company handling a purchase or quality dispute, and AMEX is at the top of the heap in that respect. I only wish that the level of honor and ethics in business transactions was what it was 30-40 years ago. A hand shake was good back then.
I've yet to experience issue with Amazon shipping unless it was a product being shipped from China. I think the Chinese use a row boat to get stuff over here if they can find 1/2 cent savings in the method. Everything else has arrived within 2 to 5 days of order placement. I have not paid extra to become a preferred customer with Amazon, I use standard shipping because it is often free or minimal in cost.