Yes, the thing is why do you need that much WD-40 if you're not a shop with regular repair work?
I understand the attraction of buying in bulk but you have to consider your use as well. Throwing a $2 small aerosol into every toolbox, tackle box, glove compartment and the kitchen drawer works for me. Not only is it compact, and always handy when I need it, wherever I need it, if I run out, I know where another spray bottle is. I use the same approach with Bic lighters.