Currently, not very many.
SLR:
Nikon F5 (actually in my hands, as in, I can grab it and shoot with it)
Nikon F FTn (2/3rd's paid off - should be paid off by the weekend and then shipped out next week)
Pentax Super A (bought this for a friend - still need to get the paperwork necessary to cross the border into Canada and deliver it to him)
(...)
Nikomat FTn parts camera
Nikkormat FT2
Nikomat FT2
Nikon F
Nikon F2A x2
Nikon F3HP
Nikon F3P
Nikon F4
Nikon FM x2 (one black, one chrome)
Nikon FM2n x2 (one parts camera, one frankenstein camera)
(...)
2 Nikkormat FT bodies (one working, one donor)
24 Nikkormat/Nikomat FTn bodies (some functional, some parts)
16 Nikkormat/Nikomat FT2 bodies (same as above)
4 Nikkormat FT3 bodies
3 Nikkormat/Nikomat EL bodies (two worked, but weren't that great, one had dead cells)
3 Nikon FE bodies (one worked, two parts)
2 Nikon FE2 bodies
9 Nikon FM bodies (some parts, some ok)
3 Nikon FM2 bodies (early model - one good, two parts)
22 Nikon FM2n bodies (two parts bodies)
13 Nikon F bodies (two junkers)
12 Nikon F2 bodies
12 Nikon F3 bodies (two Press versions included, and two parts cameras)
15 Nikon F4 bodies
5 Nikon F5 bodies
(...)