I am assuming they are just out of stock temporarily. I wanted one a while back and I just had to wait a little bit. If you email their support, they are super helpful.
If you've never taken it apart, i would definitely do that before ordering stuff from baratza. There's a good chance if you've been using it for a while that's you have some broken bits of the paddles that clear grounds into the chute, and that's easy to replace when you replace the burrs. Same thing with the upper burr carrier. It uses 3 points of contact to maintain a setting, and if one breaks, it's not super obvious except in makes a less consistent grind. To get to that, you just need to pull off the hopper and upper carrier without any tools.