I would do some research on Google for used mini laptops or eventually on ebay. This will give you at least some kind of an idea what it's current market value.
My uncle and my aunt bought a DEGEE 10.2" Intel Atom D425 Mini Laptop for their son back in 5/2010 who was away in Africa when he returned. He died while in Africa. They have this laptop and its been suggested since they will never use it then to sell it. they have no idea what to ask for a selling price. They paid a little over a $1000 for it back then knowing full well they will never get anything close to that now. As a retired couple on a fixed income any fair amount to sell it for is what they need. They have no idea what to ask for it.
Thank you for your time.