While searching for a less expensive eyeshadow primer/base at Ulta, I came across this little pot from NYX. I've used their Jumbo Pencils in the past and like them, do I thought it was worth a shot!
This shadow base comes in one color and it should work well on light to medium skin tones. It seems to block any discoloration in your lids and clings to shadows well. It does have a fairly sticky texture.
Overall, it does it's job and makes my shadows more vibrant and longer lasting. I'm not sure I like it better than my Tarte primer, but it's a nice option if you don't have much you spend!