The free Harp Mic Buyers Guide is loaded with useful information on the often misunderstood topic of harp mic's. It will help you to identify inferior workmanship, and to recognize many of the common selling scams that abound on online auction sites. You will not recieve any marketing spam, only the buyers guide... it's a great tool regardless of where you go to get your mic.
If I have not recently updated the guide there may be info in regard to pricing that is no longer accurate, most everything else should remain fairly constant. - Most recent major revision was Feb 2011.