There was recently some buzz in a polish group I am in about these holo polishes from Nabi. I was able to get 6 for about $20 with free shipping on Ebay. Good deal, I think! While these aren't linear, they are super sparkly and definitely shine in the sunlight.
This is Dark Purple in indirect sunlight. Second photo is with flash.
To add a little something to this mani, I scotch taped off the corners and painted China Glaze Sweet Hook with Sation Fake It Till You Make It on top. Love this glitter topper!
If you want to get your hands on some of these Nabi holos *here* is the link to the eBay seller I got mine from. There are other options to get more or less polishes in different listings.
What do you think of this holo from Nabi?