While most Leica lenses cost thousands of dollars, you can pick one up on eBay now for $US995. There's just one catch... it's in half.
It wasn't some random Sigma fan armed with a hacksaw - oh no, it was those darned Leica students, who created them for a graduation project. The lenses, a Leica Tri-Elmar-M 28-35-50mm (top) and Leica 50mm f/1.4 Summilux M ASPH (below) show an interesting cross-section of the various components used in their creation. The Tri-Elmar-M, discontinued in 2007, can be had for $US995 over on eBay now - it even comes in a special keepsake Leica box.