Gift forum posts and blog comments

Hi, I am looking for someone to help me launch my site by posting information about my Gift Voucher site on forums and blogs related to: Gifts Womens issues Competitions Gaming Celebrity Parenting These links should be 'do follow' and be within context and should be more promoting the site rather than spammy comments. Please provide examples of sites you would look to use and previous examples of your work. I am looking to pay $30 for 400 comments, and if you do well this will be an on-going monthly project. Vikki