Sorry if you already covered this (I tried searching, but tumblr's search is shitty). Elf's eye shadow primer is also pretty great, especially for $1. Urban Decay's works *slightly* better (at least on my crazy oily eyelids) but not enough to justify paying 20x more.

I’m going to cover this in an upcoming post on things I have heard are awesome but have never tried. Thanks for the testimonial!