I'm owning a Sony stereo microphone ECM-DS70P as seen on the picture for a year now which I bought for around $70. A bit pricy, but totally worth it. I used it for a while untill I came across a $3,95 microphone on the Chinese webshop Dealextreme that looked exactly the same. I decided to buy it and compare it with the real thing. It took a while before it got here but after it arrived I tested it and I was stunned by the amazing quality of this microphone. I tested the two microphones in exactly the same way and it turned out the only difference was the "Sony" logo that wasn't there on the cheap microphone.
Turns out this is proof that the stuff Sony sells is just cheap crap from China with a white text saying "Sony" on it. I recommend to search cheap gadgets sites such as dealextreme.com as mentioned above before you buy something from the real company.