eBay Average Price "Searcher" Based on Item condition

Hi, I want a programme / website that when I enter the items name, for example "iphone 8 64gb", and choose the items condition (used/faulty/new), it then tells me the average sale price as either a "buy-it-now" or "auction". This information is available on the ebay website, but it does not give a "average", just the last sold prices. Such as; [login to view URL] This is for ebay.co.uk. I am looking for this asap, and it must be cheap. Maybe you have made it already?