Anything I no longer want, whether it came down the family or not, gets offered to the children and if they do not want it disposed off. Either charity shop, ebay or auction.
Selling on ebay is easy. If it is small enough and light enough to be posted then weigh it and you can check on ebay the postage cost, add on extra for the cost of packaging materials. I send bigger items by MyHermes, (as long as they are not breakable), and if the cost of post or courier would be outrageous make it 'buyer collect'
Most of my furniture and much of my china is inherited but kept because I like it and use it. Once I am dead DC can do what they like with the contents of the house, I will not be there to know about it.
I do not mind having 'stuff' in the house, but I hate clutter. I am always going through cupboards and drawers to see if anything has reached the clutter stage and should be ditched. I probably deliver goods to the charity shop at least once a month.