Currently I have 25, and 5 more are in the mail on their way.
In my few months I went a bit crazy buying everything to try and now I know I won't be restoring blades so I stopped buying ebay specials.
I will probably end up selling all my 7/8ths since they are a bit too big for me and keep about 15 in my rotation.
I have taken a liking to TI's lately.