I can't seem to find any federal or even state laws banning what you have here. I am not a lawyer or anything and I might be wrong but I think you should be well within US law owning and selling these items. Using them, that is a different story. If you know a specific law you thinks restricts this I would be happy to look over it. Good luck with your sale.
The knife can be shipped anywhere knifes are legal which is almost everywhere.
I mean the cock gaffes and stuff which I did not show in pictures can not go to places where it is illegal. They cant go to California like you just showed. California is actually one of less restrictive states in the united states for this stuff and there still is a lot of cockfighting there because some of the politicians go to the cockfights.
Its not my job do research for laws where you are but gaffs and spurs 100% not ok to ship within united states there is a federal law signed by Donald Trump to make doing things done by brown people illegal.