You can get free appraisals of collectibles at a number of websites such as Lofty. The services provided through Lofty include appraisal and the ability to sell your collectible through the website.
The process of appraisal on the Lofty webpage includes setting up an account with the site and uploading pictures of your collectible to your account. The Lofty webpage states that you are able to keep your collectible at home while you are trying to sell it. If you choose to sell a collectible through Lofty, you are asked to pay a commission fee once the item is sold.