For sale is a black Leica 35mm Brightline Viewfinder, in absolutely mint condition. This item is fairly rare.

I was using it with a 35 Lux at F1.4 to get more accurate focusing on the M9. Basically, you can leave a 1.4x magnifier on the body viewfinder, and then use this little gem to compose your image. Works perfectly.

Price: $400