Good question!! I would probably buy a foot for my sewing machine - I've been looking at those teflon feet for sewing on laminate fabric. Maybe a pattern or two - I love a bag pattern that includes an art portfolio, and maybe a zipper or two. All that would probably bring me to $100. LOL!!!
There are a few little things I'd probably buy. Bobbins, because I never seem to have an empty one. Rotary blades, because we all know how quickly those dull. Needle threaders, because my eyesight isn't what it used to be. And the balance would be spent on fabric, of course!
hmmm...fabric i have been eyeing but just don't need for anything specific. nothing beats buying just because you love it. i would also love some new books...just to gather inspiration.
So many options ... I think just for fun I'd buy some Superior quilting thread in colors I don't have yet. About 10 spools of that, plus tax, would take care of that $100.
oh wouldn't that be fun! Right now I need a better ironing surface - and bigger! I have a june tailor 18x24 board and a homemade 18x15 board that sit together on one end of my worktable - but I would luxuriate in a giant ironing surface!!!