Northrup Way, Bellevue, WA 98005 Vector Electronics , located next door to Active Electronics in Bellevue is essentially an electronic junk store. They have miscellaneous parts at really cheap prices. Most of this is buy at your own risk though and you will probably have to experiment to figure out how it works. I have found some great stuff there. Stop by and browse around when you go to Active.
Radar is located in downtown Seattle.
Check web page for exact location. Don't know too much about them though. Of course there is the old standard Radio Shack . For the most part I find them to have little selection and be way overpriced, but sometimes, they are all that is available. Mail-Order Distributers Jameco is an excellent supplier.