Box Office PHP AJAX System

I have a lagging project that a couple other GAF providers have fouled up and we are almost going to start over at this point. We need a ticket registration/purchasing system with a backend admin panel to control the application. If you look at this site [login to view URL] we want some features of this site: 1. Clean design and display of all events 2. Click on event for more description and ability to purchase different performance tickets 3. Search function to find performances, dates, etc. 4. Will have 2 different pricing options (for adults and students) 5. Ability to accept donations 6. Would like to process payments through PayPal standard unless better option is provided (non-profit cannot afford monthly costs) And last, we like the functionality of the cart on this site: [login to view URL] When you add a product it automatically puts it in the left side and stays with you all the time while you are on the site. Keep this site in mind as I like the layout and structure (not necessarily the colors) There is no rush on this project as we will be meticulous in getting it to where we need it since we were burned by 2 other GAF providers. Our clients expected budget is no more than $300 and it will not go in escrow until a demo is tested. Cheers, Adam