hello sir we are being in this industry since very long and have gained expertise in making such projects and websites for you whichare very user friendly and easy to understand. in past we have already worked on such projects of auctioning and biding. we have gained expertise in making such projects beyond the expectation of the client. we are experts in doing php projects, have vast experience of php ,mysql,ajax. site can be delivered within maximum 5 days . I went through your requirements carefully and they seems to be manageable .
we will be using php, mysql,ajax and css, to make your website look truly attractive.
hoping for a positive reply from you , give a chance we wont let you down thanks regards.