Need advice on a lens (100mm)

I'm using the Olympus Zuiko 100mm f 2.8 on my NEX-7 with really nice results. I like the size and weight as well. KEH has a couple of these available now. Here's a shot I took with the lens. Not very exciting, but at least you can see the detail. This is not processed at all, just an uncropped 100% jpeg export from Lightroom.