Its definitely a great price for that design and the use you'd probably get out of it, but I still think thats expensive for non-leather. Sometimes Macy's or Hecht's have Nine West bags on sale and you could try to get it for around $50 plus a coupon?
Something that my sister just realized after searching for a bag for her this weekend. Most 9 West bags that are in Macys and such are also in Marshalls and Steinmarts. The same exact styles and colors but are less at Marshalls and Steinmart. So just check around first, oh and the bag is very cute!