If I am by myself, i get as much as I can sneak in the house! LOL Unfortunately, but fortunately, my hubby goes with me all the time to help pick stuff out (the good part) so he pretty much knows how much it all costs (the bad part). ROFL
But really, if it is something I like i buy as much as I can afford. Always at least a yard if 2 or 3 if I can. Bills and food come first, well most of the time. *giggle giggle*