* Maker and year of production. Some decanters are made by well-known manufacturers, such as Lenox, and are considered more collectible. Decanters that were produced during Elvis's lifetime or shortly after his death are generally more valuable than those made later.
* Limited edition or special edition. Decanters that are part of a limited edition or special edition series are generally more valuable than regular decanters.
* Design and condition. Decanters that are well-designed and in good condition are more likely to be valuable. Look for decanters with detailed designs and no chips, cracks, or other damage.
* Packaging and accessories. Decanters that still have their original packaging and accessories, such as stoppers or boxes, are more valuable than those without.
It's important to note that the value of Elvis liquor decanters can fluctuate over time, and it can be difficult to accurately estimate their worth without consulting an expert or an auction house that specializes in celebrity memorabilia.