Hi DR great post!
Re Bullion I think these have to be 'government issued' with face value and one's which aren't are just referred to as rounds. - Rounds tend to sell for less and they tend (but not all) to have less security features on them.
IMO some bullion do have semi numismatic value such as the 'Somalia Elephant' and so people ought to look at which are likely to give more 'bang for the buck'
Oh yes you are correct. I just group everything together to try to make it as easy to get the most novice person to understand the world of Silver. But I do plan on make a much more extensive Post in the future regarding what you have written about. I want to break down all the different types and so on. Thanks for the comment bud.