If you have a good idea about the current market value on your cues, and you have a good quality weight scale, digital caliper, and a decent quality digital camera, then you could sell the cues yourself.
Billiard Bill's is a very nice, and honest seller though, that would probably do a great job at selling your cues for you, at a fair price to the buyers out there.
https://www.billiardbills.com/
