My friend picked up Urban Decay's Heavy Metal Glitter Liner in Metalhead for me while I was in Turkey. It was on sale for I believe only $4-6 which was awesome. It goes on precisely and the sparkle can be made more intense by layering.
For this to be on sale I'm thinking that the liner must have gotten reformulated. I really like this one so if the new ones are even better then I might seriously consider getting another...I just wish they didn't cost so much.
Where to buy: Urbandecay.com, sephora