there are alot of places where you can post for free:-www.onlinefreemarketing.ws/ads.html
Depending on the product or service you are planning on offering you can always have a site do a survey on your site. I recommend WEW Research because they can offer you a package that will send visitors to your site and you can even get a review about your consumers views on your site or product. This information is invaluable. E-mail them and I m pretty sure they can work something out with you!
