What is the best, and easiest way to sell comics. We have hundreds of Marvels in Mint Condition, boxed, seale?

We need to sell these comics as they are just sitting in a box. They are all boarded and sealed, mint condition, just dont know what is the best place to sell them. Ebay is a hassle as they take SO long to add and we have so many. Does anyone know a site or place that you can just list series etc?