Where to sell old comics and records?

I’m selling old x-men comics and old old old 78s and 45s. The records where my grandfathers and the comics are my fathers and no know is listening to the records they’re in great condition they haven’t been played in about 4 years but have been kept in good conditions. Same conditions my grandfather left them in. They comics have only been read once and were then placed under lock and key so they are in perfect condition the same as they were when we bought them. So what are good legitimate places to sell these items? What are good legitimate places to sell these items in Mississippi?