If you can find someone that collects this stuff, $5dollars maybe a little more..
if its national collectors about 300 to 400$
Yes, it can. You can tribute summon The Wicked Avatar with Double Coston plus one more monster, as Double Coston counts as two.
Private mints oftentimes have coins in different materials than what they advertise, but from what I can tell, the majority of National Collector's Mint double eagle "coins" are base metal (I'd assume either copper, steel, aluminum, nickel, zinc or some alloy of them) with a tiny amount of gold plating.
Yes, you can. If a token can't be tributed, the effect that places them will say so. For example, Scapegoat says the tokens it creates cannot be tributed for a Tribute Summon. Destiny Hero Double Dude places no restrictions on the tokens it summons, so you can tribute them for anything that you could tribute a regular monster for.
Double the original period ==> 1/2 of the original frequency
In 1933 the cost was less than $20.00, manufacturing the coin had to be less than face value. But if you mean a replica, likely less than a dollar.
The Saint's Double Trouble - 1940 is rated/received certificates of: Finland:K-7 (2004) Sweden:15 UK:A (original rating) USA:Passed (National Board of Review) USA:Approved (PCA #5901)
Yes, you can tribute monsters for card effects and Tribute Summon the same turn you summon a monster. However, you cannot Normal Summon a monster and Tribute Summon on the same turn because you can only Normal Summon once per turn. Cards such as Double Summon and Ultimate Offering will let you do that.
Double Summon allows you to have an extra Normal Summon. This Normal Summon is no different to your usual once-per turn Normal Summon. If you've got two monsters to tribute, then sure, you can tribute them for an 8-star monster.
Yes and it has become a very valuable collectors item
Double price is equal to 200% of the original price.
It means to multiply the number by 2 or to add it to itself. So if the original number is 10, then double that number would be 20.