Does she travel a lot? Or at least like to travel? A nice carry on bag is a perfect present. It'll be less than $100 and you can get some really nice ones that are very fashionable. Just DONT GET BLACK. Everyone has black, and she'll love something that stands out a bit. Go for something that's about the same size as a laptop bag but much thicker, kind of like a cross between a laptop case and a briefcase with a large internal area and a flatter section on the outside. Like this:
http://www.google.com.au/imgres?q=samsonite+carry+on&um=1&hl=en&safe=off&sa=N&biw=1280&bih=617&tbm=isch&tbnid=FKoYAMOnCdrH1M:&imgrefurl=http://www.royaltag.com.au/p165-samsonite-navy-carry-on-cabin-luggage-for-men.aspx&docid=kxSVLhu5poK6AM&imgurl=http://www.royaltag.com.au/database/images/prod_165.jpg&w=400&h=400&ei=2RvzTs20CKfHmQWN2sCzAg&zoom=1&iact=hc&vpx=889&vpy=289&dur=586&hovh=127&hovw=126&tx=114&ty=210&sig=109615964328627737481&page=1&tbnh=127&tbnw=126&start=0&ndsp=21&ved=1t:429,r:19,s:0
But brighter.