The LCD-based Aluratek ereader is selling for $99 from Sears.com in both black and white. It’s the lowest price so far that I’ve seen. The Libre usually hovers between $120 and $150.
Unlike some similar units, the Libre works with Adobe Digital Editions for DRM-encrypted EPUB and PDF ebooks, which are the most widely used formats by independent ebook retailers and libraries. You can read more about the device’s specs on the more ereaders page.
(Tip found via MobileRead.)