Cents and half-dollars were the only genuine "Confederate coins", and even these were just patterns, not struck in circulation quantity. The 5 dollar and 20 dollar coins are pure fantasy - though I believe the same fantasy CSA $20 design was featured in the 2005 film "Sahara", where the hero uses one as an impromptu (and improbable) screwdriver.
As for the value of these replicas/fantasies, I suppose they would have sold for a few dollars at one of the civil war site tourist traps. I wouldn't expect to get much more for them.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis