hoobly.com,oodle.com,recycler.com classified ads poster needed

hello my name is jane i am looking for a classified ads poster to post pets ads and i am only searching for someone that is willing to do a sample work first to show credibility before we sign the contract to work
list of classifieds to post
1 hoobly.com
2 oodle.com
3 recycler.com
pets only contact me if you can do the job