Think that good lenses can't be cheap? I don't know. But unique lenses that deliver great results can definitely be cheap. Canon 50mm f1.8 LTM is a good example of that.
Canon 50mm F1.8 LTM on A Leica T - by Ed Lara - 35mmc
Canon 50mm 1.8 LTM - mainly at night - Photo Thinking - Lens Review
Canon 50mm f1.2 LTM Lens Review - 50mmF2
Canon 50mm f/1.8 Lens for Rangefinder Cameras, Black/Chrome {40} at KEH Camera
Canon VT Rangefinder Camera, 50mm f1.8 LTM Lens, M39 Leica Mount
Canon 50mm f1.4 LTM
Fujinon 5cm f/2 Fujinon 50mm F2 LTM Lens — LEICA MOMENT REVIEW
Canon 50mm f/1.4 ltm lens Review - An impressive classic gem - 35mmc
Review: Canon 50mm 1.2 LTM