Top Rated Plus eBay seller 6ave (99.4% positive ratings) has the Canon EF 50mm f/1.8 II lens, also known as the “nifty fifty”, [shoplink 20227 ebay]on sale for $102[/shoplink]. Compare to $125. Free shipping in the US.
Though this is an inexpensive lens, and a lens made entirely out of industrial plastics (except for the optics), it is well-regarded for the bright aperture and the surprising (given the price) optical performance. In other words: That’s a lens every Canon shooter should have in his or hers bag, and at that price it is a no brainer.