Expert Ebay developer needed

I am looking for a software which could help me to find the things in eBay as soon as they are posted. The reason behind this that sometime many seller post items at very low cost and due to that many people have got software with them that inform them about the products being posted and they buy it asap in few minutes of being posted. For this we cannot get the opportunity to buy at low cost. So i want some one who could make me a software who could help me achieve that. Please do also advice me that in which technology it can be made and what all other things is required for me in progress of the job. Do i need to buy the hosting? Yes or No Do i need any kind of API integration? Yes or No. If yes please give me details of what all API. Do i need any kind of registration in eBay? Yes or No. Please do answer me all answers below- 1) Ability to deliver the work on time. 2) Understanding the work in depth 3) Availability on Skype when working. All payments will be done in via freelancer only. All payments will be done once it is done and completely verified and tested.