iPhone/Android/BB app for our classified website

We need iPhone/Droid/BB apps for our classifieds site Features: 1-Sign in (standard and thru Facebook)- Register 2-Search - Advanced Search 3-Check Listings and Categories 4-Ability to Post an Ad 5-Ability to Pay for options 6-Ability to Manage ads - profile 7-ability of sellers to take a picture and upload an image directly from their phone. 8-ability of users (buyers/sellers) to communicate with each other by sending chat messages(like website private messages) 9-ability to list products for sale according to how near they are to user. 10-ability for user to choose to map the listings into google map to see where other sellers are. should be very simple experience developer of his expertise. If you can develop it for all platform then you will have more chances of getting project or else i can award to different expertise for separate platforms. Let me know what for platform you are bidding? Budget $200-$300 max for each platform!! Regards, PB.