We bought around 6-8 rubik's brands before buying rubik's diy's online, I think 3 of them, 2 black, 1 white.
I think my first non-rubik's brand was type C, not entirely sure, because I had/have (couple I gave away) loads of C's and all cubes from A to F.
And type A's I have probably all brands. Then there were several random cubes before I finally got my first guhong, nowadays using zhanchi. A-V was my main before guhong.
I don't know the exact count of our 3x3's, but I think at least 30+, could be much more.