Too many. I'd say about a dozen and change, err, parts.
Lessee - 3x BS (M), 3x MX black, 2x MX clear, 1x MX blue, 1x ML, 1x Alps white, 1x Alps black, 1x Acer, 1x Futaba, 3x MY (not including 1 parts donor), 1x rubber dome. That would be like... 18 working boards. Oh crap.