The NYX shadows recommended are all about $5 (also check for their 3-color pallettes, which, during a sale, cost around $5.99 and you get more bang for the buck. Some of them have several of the colors you may want), and you can get them online for less during sales. Also, check your BS for Black Radiance products, which may include some of their discontinued shadows, which are plenty neutral. And last but not least e-bay. Not those people with storefronts for their stores but actual individual sellers can sometimes be a bargain.