This article is from the Paper Money Collecting FAQ, by Bruce Giese firstname.lastname@example.org with numerous contributions by others.
Alan Herbert <email@example.com> has a regular column in Bank Note
Reporter and is a regular member of the newsgroup. He also authored
portions of books such as the "Error Notes" chapter of the Standard
Catalog of US Paper Money and is a respected authority in the field.
Many other highly respected members of the paper money collecting
community are invovled in the newsgroup and it can be very helpful
to post questions there.
A huge list of dealers has been compiled and is posted directly
in rec.collecting.paper-money. You can find it in the newsgroup (posted
at roughly the same time as this FAQ) and at this web site: