Going to populate the top tier (Patreon)

I have been struggling to figure out what the highest Patrons should be rewarded with, and I think I have at least a starting idea. I have noticed I never post the full linework sets of my projects. Sometimes I release 1 linework in a set but never the entire thing. I'm going to start releasing some old ones and then be sure to release the new ones each month.

I'll still be releasing single lineworks for $1 rewards, but the full sets will be in the $30 tier only. Now I am open for more ideas in the $30. I want there to be yet another reward but one that is achievable as well. 

I'm toying with the idea of switching the Library to $30 and the lineworks to $20 too. What do you all think?