Replying to Knowing exactly what your stuff is worth

So I had an interesting idea that I think could be really useful. Websites that incorporate buying and selling forums (like this site) should have a feature where you can upload your photos of whatever you want to sell and the site can give you an accurate estimate of what your used stuff is actually worth based on the photos you upload.

For example, you could take some pretty clear photos of a jacket you have and upload them to that section of the site and it would show you exactly what it's worth and you can use that estimate to make your price.

Just thought it would be a cool idea for NS.