I need to launch a web based product. It is useful for consumers who want to make buying decisions. It is helpful mainly for general public. Like, someone want to buy a car. My web based product would help him to buy the car. It is sort of expert system,say.

I want to conduct a survey before launching this project. It is very expensive to develop. I don't want to launch this project without consumer opinion.

Can you please guide me how to conduct this public survey. I don't want to annoy people. I want to know a nice way to communicate.

Please help.