Who here is a sports card trader?

Im a big card collector, since I was in middle school. I usually check out ebay every now and then to see how much my basketball cards are worth. Just signed up to your platform. It would be cool if there is a service you provide that evaluates your card based on authenticity, condition, and estimates a price (using some sort of algorithm that compares similar cards on other sites and eventually your site when you have many users). Good luck!!!