Summarize the following:
If you only have one Lladro piece to sell, extensive research won't be necessary. On the other hand, if you have a large collection of pieces to sell, you should probably do some research regarding the various finishes and trademarks used for certain Lladro pieces. Focus your research on information that will allow you to verify the authenticity of each piece. For instance, most Lladro pieces are marked with the company's bellflower trademark, but some older pieces may not have it. Get as much detail as possible. At minimum, you should know the piece number and name of the piece.  If you still have the original packaging, both the piece number and name should be on it. In rare instances, this information may also be printed on the base of the piece. When possible, you should also find out the date the piece was originally issued and, when appropriate, the date it was retired. Identify the sculptor, too. Anyone who wants to sell a large volume of Lladro porcelain should invest in a recent edition of an identification and price guide.  Find the most recent guide possible and look for one focused in your native currency. For instance, if you live in the United States, choose a guide that lists each value in U.S. dollars. If possible, choose an edition that is only one or two years old. Information will be too outdated in any version older than that. A catalog of active Lladro pieces can be found on the company's official website. If the piece you want to sell is part of an active collection, the current retail price of that piece should be available through the Lladro catalog. You can also find out other information, like issue date or product specifics, via the catalog. "Value" is a somewhat subjective term. You'll need to research the various listed values for a specific piece and determine the true sale value through comparison.  Retail value refers to the price an official retailer would charge for a piece. Replacement value refers to the amount of money a piece can be insured for. Auction value refers to the amount of money you should theoretically be able to sell the piece for at an auction. The price you can sell an item for will usually come closest to auction value, but it can still be a little above or below this value. Keep in mind that as an individual seller, you will not be able to sell a piece for as much money as an authorized seller might.

Summary:
Do some basic research on Lladro. Know the details of each piece you plan to sell. Invest in a collector's guide. Look through the current catalog. Search retail and auction websites to determine the current price.