I've used sedo.com with success. They seem to have a wide international audience of domain pros. It is good for when you don't have the time to execute your pla

I've used sedo.com with success. They seem to have a wide international audience of domain pros. It is good for when you don't have the time to execute your plan of contacting biz's directly. They handle the transaction process via concealed identity offer and counter-offers. The con is they charge 10% of the selling price to the seller.