Need a chrome extension that helps predict sales profit margins

RESALE CODE NEEDS: I have a Resale business where I find items from Site "A" check the average sale price of that item on Ebay under the sold items criteria, then calculate estimated profit based on Ebay's average minus the purchase price on Site "A". I do all this to decide if I will decide to bid on the product. The software I need would Ideally Scan a page/ pages from site "A" containing product listings and current auction price, then it would basically copy paste the title of the product listing into Ebay with the “used" and "sold items" criteria, and then search Ebay for that item. The software next would average all the returned sold price results of the item on Ebay, this would provide an estimated value of the product. After obtaining the estimated value it would subtract that amount from the cost of the item on site "A" I would like it to take this number and check it against a user side custom input amount representing acceptable "profit". If the estimated value is greater than the custom number entered, I’d for the software to then either mark the item green on Site"A" with an overlay or possibly save the URL of the green item to a Text file. If the item has no results on Ebay or is below the acceptable profit margins specified, I would like the item to show red, and not be listed. I would also ask that there are a few other user inputs that can tell the software to either target and highlight or ignore certain items based on their current price and possibly based on user entered/ customized keywords. My ideal for this project would be a software that does this quickly in the background for all of the 40 different items per page on site "A", once it has checked each item, it adds a green overlay to the listing, and will give new results each time a new page is loaded. I would also like some sort of overlay HUD that would display current results of items such as “highest profit on page” clicking this button would take you to the listing with the highest calculated profit. Also a “total profitable items on page” counter would be nice, as well as a total calculation time for all items. while not needed for this first test version of the software eventually Id like to add other websites as well to be integrated into the extension. That will be the gist of what I’d like the software to do.