What an Auction Website Dashboard Should Do
The primary goal of a dashboard is to be a jumping-off point that allows users to self-serve, helping them find whatever they are looking for in the fewest steps possible. This is true for both buyers and sellers, though this will usually be two separate pages to accommodate the needs of each user. (When you have users who are both buyers and sellers, you can offer different options for how those two aspects are split.)
Users have come to expect dashboards on all eCommerce sites; they are looking for a central location where they can find everything they need to make transactions happen. Make sure you have what both buyers and sellers are looking for in a dashboard.