If this or that item has ceased to be useful to you and you want to get rid of it and benefit from it, then just sell it. It's easy to do!
If you want to sell an item on favorable terms, then it must be fully functional and have a marketable appearance. Those. carefully prepare the item for sale: if there are defects - eliminate them, fix, wash, clean "to shine"!
Take some good photos and put them up for sale on several sales sites, for example a very good site - Avito.ru. It is important that you describe the product in detail, post a photo of it from different sides, if there was a repair, be sure to write it down (do not deceive the buyer).
Before setting your own price for a product, look at the same sites for how much similar products cost, and in this regard, already set a price. Make a post on social networks, also with a photo and a detailed description, ask your friends to share the post on their pages.
You can print a notice and hang it on an information post near your home, or on an information board near your entrance or nearby. If a product has not been bought from you for a long time, reduce the price - it may be overpriced and people find a similar product at a more attractive price.
If you want to sell a lot of small items - try to combine them and sell them together "in bulk" by setting an appropriate price for the buyer - perhaps someone will be interested in your offer faster than selling small items separately. Don't be afraid to come up with promotions. "Buy an apartment, you will receive a cap as a gift" - funny, but it really works.