Amazon.com has the Cingular BlackBerry Pearl listed on their site and here is the screen grab to prove it. You could, of course, actually go to their site to see for yourself as well.
Looks like Amazon is offering the Cingular BlackBerry Pearl for $49.99 when purchased with a three year Cingular plan. The device will set you back almost $500 bucks without the service plan.
Amazon is also running a promotion where you can get a free Logitech Bluetooth headset when you buy a qualifying Bluetooth enabled phone which the Cingular BlackBerry Pearl is. The headset is worth $19.95.