If you are interested in ordering a horn e mail me and we'll discuss the options and price. There are so many variables in horn design that it would be far better to go over those details individually rather than list them all here.
I also make Native American horns using designs current in the 18th century. There are very few actual Native American horns in existance today, so the designs come from pottery, quillwork' shell engraving and the like. We also like to trade! Below are some items Id consider trading horns for.
Southern style fingerwoven Sash
Quillwork
Trade silver ( real silver only)
Hand sewn clothing(weskit, shirts size XXL, 1750's}
Braintan hides