Here are some shops where you might check out for buying your first harp:
Harp maker from Pakistan, for very affordable harps that are acceptable quality for beginners.
Camac Harps in France have very good Celtic harps for beginners, as well as good quality pedal harps.
A great place for buying music and other harp related stuff on the internet.
Your largest source of harp and harp related accessories and music in Europe.
A reliable harp store in the USA.
A good place to look for a second hand harp.