Seems like the best way is ebay. They say u can search for "completed listings" by the lladro item number for the piece. I think the number is on the bottom of the piece.
At the bottom of this page there is a thing that says find the true value on ebay with instructions:
Sounds like ebay is going to be the easiest way to sell. Maybe could find the values on ebay and then post on craigslist instead? just a different option. Also they say you can get more if you have the original boxes but probably dont have those i guess. Also will need to take pictures of them for the listings. Make sure to set a reserve price when putting on ebay so it doesn't sell for less than the reserve price.