Ten, but that includes a tiny old toy machine. And one I bought to make a lamp out of but didn't have the heart to ruin it. And a family treadle machine.
Ones I use or hope to eventually: My good Viking embroidery machine, two featherweights (one my dh wants me to sell), a small babylock to take to classes when I need a machine that does more than straight stitching, my serger, a 301 that was given to me, and an old machine I lent to a young woman who wants to learn to sew.
I will probably remember more once I send this message.
Kat