Build an inventory management & sales analytics tool for eBay

We're a UK based company on the look out for a long term business relationship with a reputable software development freelancer/company. Our first project we're currently looking to get started is an inventory management & sales analytics tool for eBay. The programme should automatically pick up the item details of a product selling on eBay and create meaningful files/diagrams/CSV regarding the number of products sold, compare the quantity sold to previous time periods, create diagrams where relevant etc. Looking for a tailored system and some great people that we can continue to work with long term. Please include the following code in your proposal (allows us to filter out automated proposals. Any proposals without this will be rejected automatically): KPF94