I am considering opening a pottery store.  I would like to sell old
pottery, collectible pottery and even antique pottery.

However, I really need to get an extensive list of the all the types
of pottery styles and types.  As well I need a list of pottery
manufacturers (historical and current).  The most important thing for
me is to be able to identify any type of pottery that comes my way by
the markings.  And I really need to know what to look for when it
comes to identifying true antiques versus replicas.  Another aspect of
this is I need to know what types of pottery are more valuable and
what types are not.

Beyond the above specific lists, I would like to know what resources
there are on the web for identifying pottery and any really active
forums or sites.  That way I can keep up on the latest news and
information.  I'm not looking for sites about new pottery or retail
pottery type sites and I don't want information on how to make or sell
homemade pottery.  However, I would like to know about sites that can
sell supplies to my customers so that I can get referral commissions
from them.

General historical information that is relevant to identifying pottery
would be awesome.  It would really help to understand the history of
the more common but valuable pottery, so that I can watch for it.

The store will be in the US, so I'm mostly concerned about US pottery
and pottery that has come over from other countries like the UK or
China as well as indigenous pottery; basically pottery that I would be
able to get my hands on easily.