Let's see...

Olympus E-30 digital, Bronica ETRS, Canon T90, Canon T70, Polaroid SX-70 PRONTO, Polaroid 600, Canon QL17 GIII, Olympus XA.
And a Pentax ME super that doesn't flip the mirror anymore that I don't use.

That's 8. 9 if you count the one that doesn't work.