One thing I'd point out is, if you do opt to order online, order dry yeasts during the summer. I just learned that one the hard way. If you want liquid yeast (which I prefer) I'd get it in person locally.
100 bucks is pricey but that sounds like a basic start up equipment kit (fermenter, airlock, siphoning and bottling equipment, hydrometer, capper, etc). It's not going to include the equipment you'll need for all-grain brewing (although almost all of that equipment you can build yourself). Some folks on this forum have easily dropped multiple thousands of dollars on equipment (brew sculptures, top of the line kettles, conical fermenters, kegging set ups and the like), but you can still make damned good homebrew with a pretty basic equipment kit.