If you haven't seen it, his Simpsons couch gag is amazing. I'm surprised this made it to air.
He also has several films. They're pretty out there and not really in the same bizare humor of his Rejected cartoons. But still amazing.
Here's a scene from one. https://youtu.be/GOZDRQVjsR0

This comic was from 89. So it would have been worth $89. When it became 1990 it would have been worth $90. Thats how inflation works. Every year things cost a dollar more.