You will need to write a php script that will take data from numerous vendors (either from csv files or directly from the databases) and will then process and sort the products based on certain per vendor criteria. The script will then make that data available (either by csv or by pushing the data) for importing into amazon, ebay, etc.. Please mention the word "oscar" when you post your bid that way we know you read the summary. Full details available upon request
Please remember to request for more info before bidding.