I find ebay works great, though they do take a reasonable chunk of the money. The reputation aspect is handled for you. Auctions for most things seem to sell for reasonable prices, so it removes the effort of working out a good price. At least in the UK, a few clicks after your item sells on the website and a courier will pick it up the next day from your home. Before this was a thing, working out how to ship large items was more hassle and quite expensive.