No. The Halfcrown is part of a redundant/obselete currency.
The British Halfcrown coin was withdrawn from circulation and demonetised in 1970 and is no longer legal tender.
If you are looking for a valuation on a Halfcrown coin, please supply the country, year and condition of the coin.
These coins are neither rare nor valuable. If you really want to sell it, try a coin dealer in your area. Whatever he gives you for it might pay for your train fare.
If the coin is from a original bank or Mint roll, technically the coin is uncirculated, but so many collectors and dealers got them for face value from banks they are difficult to sell for more than face value.
No. It is gold bullion minted by the Bank of Mexico and you can sell and purchase such coins (called Centenarios) at any bank in Mexico. Its buying/selling price is on the USD$1,250 - 1,430 range.
Where do you sell a foreign coin collection and how do you know what it is worth>
Remember, there is no gold in a "golden" dollar. They're made of manganese-brass and contain about a dime's worth of metal. If the coin is uncirculated and in an original mint package or a plastic slab, it might sell for $1.25 or $1.50. A dealer will pay you face value, and any bank that has them in their vaults will sell them for $1 each.
you can sell it on eBay for 1.00
They're still legal tender and can be exchanged at a bank at face value. Or, you could sell them at a coin shop for a small profit.
Uncirculated, it might sell for $1.50 to $2.00 from a dealer. However you can probably get the same thing from a bank for face value. Also, the coin is made of brass, not gold. But you knew that, didn't you?
First find the value of the coin. Then take it to a collector and make them pay what it's worth.
About a cent if you can sell them in bulk
You can find updated coin values at cointrackers, it will give you the retail prices. There is also a coin value guide you can check the value and what dealer you can use to sell coins.
They re-sell them (they only pay you a fraction of the value.)