How many Turnips do you usually buy?

Since the spike is always 8 times Joan's price, you always make 700% profit when there is a spike.

For this reason, the number of turnips bought doesn't matter; it's the amount of bells invested that matters.

I invest 1.65 million bells each Sunday.
i think i bought a turnip once... all i used it for was to get ants (of course, at the time, i didn't even know you get ants that way :p)... then i threw it out... turnips make the game too easy.