I wouldn't want to draw any conclusions without an extended personal inspection....
I found a great guide to judging.
http://www.essortment.com/hobbies/porcelainpotter_sgub.htm
The first thing that will help in determining the value ...is to try and find out the age of the item. One of the better ways of doing this is to familiarize yourself with the newer and more common items. Since there are more of these, the value of the older pieces is elevated since they are fewer and harder to find. Once you know what is common, it is often easy to pick out the unusual pieces....There are other tattletale signs to an item’s age... older items are normally heavier than newer items. When looking... the older ones will not have handles.... It should always be hand washed with a mild detergent.... Stains can sometimes be removed by scrubbing gently with a toothbrush. The luster is easily removed if rubbed too harshly.....Unfortunately, there are fake reproductions... on the market. Some are so good that it is very easy to be fooled into thinking it is the real thing. Again, you can often tell age by the weight of an item, as mentioned earlier. New pieces are usually heavier and thicker than older ones. Familiarize yourself with authentic markings and colors....If you are not happy with one... seek out another. Also, some items are more valuable in certain markets. So, while the value... is sometimes hard to determine, if you enjoy it and ...plan on keeping it for your own pleasure, it can be priceless.