Hello, I found some medieval coins but I don't know how to cash them? I live in Réunion island, the coins are (but some samples) still in Madagascar ( a neighboring island). Mmh, export taxes here are 20% on export of gold, quite a heavy duty I believe. Maybe also VAT will apply (20% additional duty) How do you trade, or sell or buy internationally?
In the past, I have used sites like eBay and the advertising sections of forums like this and Collectors Universe to sell internationally. As to buying, I've used MA-Shops and eBay internationally. Of course your own situation will depend on the laws of your country.