I tried creating a post the other day, but got bogged down in the "Select Image Thumb" step. I filled out the first two steps correctly (or at least thought I did), but when I got to the image part, all I get is "No thumbnail images were found at the link address you specified".
The FAQ had no wise words to assist me, maybe you do?

Curses - I didn't realize that "Bobbie for Babies" had already been done!

Who knew that Bobbing for Babies would be the big hit of the fair?

In general, only your really expensive comics are worth having graded. There is a significant cost to grading, so you wouldn't want to do it for every book you have.
Also, grading comics means they get sealed in a plastic case. If someone wants to have AND read the comic, they likely won't buy a graded copy. However, if you have a comic worth a fair amount (like any of the issues above), it is completly worth getting graded.