ebay (via peach_photo) has the Nikon 50mm f/1.8D lens for $99.99 (reg. $129.99). Note that this lens does not autofocus on lower-end Nikon DSLRs that do not have a built-in AF motor (like the D5300 and below). However, it is still popular among HDSLR shooters with those cameras due to the smooth AF ring and the low cost. Check it out here on ebay.
Note this may be a grey market item. ebay seller peach_photo has a positive feedback rating of 99.6% at the time of this post.