If you think your items have a resale value my advice would be to try and sell your item's privately, you could try eBay or Gumtree, but I think the best market at the moment for the sale of second-hand goods would be Facebook Marketplace and other local buy and sell internet sites.

You could have a day out with the family at a local boot sale, or sell your items to a second-hand dealer, but please bear in mind a dealer will only give you about 20% - 30% of the items market value because they have costs for the collection, resale and delivery, and other overheads to take into account before they even start to make a profit on these items.