Automatic estimate for old electronic ? second hand items

[Jambalayoo]

Hello 
I have a website selling refurbished electronic items and I want to have a page "we buy electronic for cash" 
with a simple search engine displaying the estimate for the items with the prices for each grades (like new, good, fair, broken ) 
is there an app that do that ?
Thank you

[SustainableAdam]

This sounds so cool! I built an app called Recurate (www.recurate.com) that I'm testing now. It is specifically to allow people to sell pre-loved items on a Shopify store. Would be glad to talk about it if it sounds relevant to you.