They are worth exactly what someone is willing to pay for them. That's the world's shittiest answer but it's perpetually true. I would list them on the classifieds outlets of your choice and put a timeline on the sale....during that time take bids and sell to the highest bidder until the timeline expires. You just never know what this stuff is going to go for. Fortunately, there is a reasonable demand for everything you're selling.
A society that puts equality before freedom will get neither. A society that puts freedom before equality will get a high degree of both.