Here's another pointer, and then I'll shut up.
Never sell your copyright to anyone you don't want to profit off your work. Artwork is intellectual property, and is just as much a part of your estate as physical possessions.
I like to work in series, and then apply to the Library of Congress for official copyright forms. You can copyright a series of your prints for $25. All you have to do is send them slides of your work, along with the registration form. It used to be the law (federal), encumbent on the part of the artist, to do this within a five year period. Nowadays, the artist is automatically protected from copyright infringement, however, if unscrupulous folks do infringe...the only way to have a chance of winning in court, is to have LoC registration...in the event you decide to sue the scoundrels.
Good luck RedDg!!! There's a lot of administrative work you have to keep up with as well, especially when it comes to leaving work on consignment...but that's another thing. The older I get, the less appealing dealing with consignment becomes.
Les