Been doing some research as well and came across the following info as relates to California:
"California Penal Code section 653o(a):
It is unlawful to import into this state for commercial purposes, to possess with intent to sell, or to sell within the state, the dead body, or any part or product thereof, of any alligator, crocodile, polar bear, leopard, ocelot, tiger, cheetah, jaguar, sable antelope, wolf (Canis lupus), zebra, whale, cobra, python, sea turtle, colobus monkey, kangaroo, vicuna, sea otter, free-roaming feral horse, dolphin or porpoise (Delphinidae), Spanish lynx, or elephant."
Ebay DOES NOT ALLOW sales of any bear parts or cougar parts so that first knife - a bear jawbone - would be a no no. Jawbone knives, including bear are legal to sell in some states (Moscow H & F pictures some )it's just finding out which states - that's the answers(s) Gib and I are looking for. Here's a link
http://pages.ebay.com/help/community/png-wildlife.html
The dealers such as Moscow Hide and Fur all have a disclaimer that what they sell is legal in their state only. Any legal action taken in a sale to you makes you liable for all legal costs including any incurred by said dealer so beware!
As a final word of warning the Feds have been setting up sting operations
They will post some item that is restricted or illegal to sell, in For Sale forums. Unknowing forum members will purchase these items and then are charged with crimes. The poor slob who buys this stuff then is told that if he snitches off someone he or she knows, the charges will be dropped or reduced. This warning applies to animal products, surplus military equipment and some "health products".
for more inform check out Ron Hoods forum posting on this matter:
http://pub1.ezboard.com/fhoodlumsstuffforsale.showMessage?topicID=644.topic