Newegg via eBay has 480GB ADATA Premier SP550 2.5" SATA III Internal Solid State Drive on sale for $93.99. Shipping is free.
That puts the price below $0.20 per GB. This is a value drive, but performance isn't too terrible as long as you don't perform many sustained writes that are over 6GB in size.
Legit Reviews did a review on this drive last week - http://www.legitreviews.com/adata-premi ... iew_182725