you don't necessarily save money by building a stash that hangs around forever. sometimes it's cheaper to just buy what you need and be done with it, even at LQS prices. soooooo.......are you building a stash or collecting fabric? you have to decide if you want to make room for the expensive stuff like batting at 50% off, or backing at 50% off with coupons. the rest you might want to get as needed.
if you can get to a store fairly easily or don't mind online shopping when you need to, and you are happy enough not taking up space, why fix it if it ain't broken? i'd rather invest in a second machine, for backup, if i had to choose. which, thank god, i don't.