Mobile App similar to Craigslist

am interested in a mobile application for iPhone, Android and potentially Blackberry that is similar to the current
C r a i g s l i s t
iPhone App.

In your bid please list prices separately for:
Only iPhone
Only Android
Only Blackberry
iPhone and Android
IPhone / Android and Blackberry

While there are some changes, i will benchmark your bid based on this existing app, and based on that share or not more specifics on how my app functionalities.

In your bid, please comment on past app experience, such as apps you have created, whether you are a team, company or you do it by yourself.

Thanks