They sure do accept credit card.
Some CSR are nice and give you discount. Once, they stopped my online order, and had to "confirm" with me. At the end, my price was a bit lower, no rebate necessary, and got a free printer.
And once, they sent me two computers... I said I only ordered one. I refused to accept delivery, and kept the printer. (You know how printers don't come the same day as the system, sometimes).