Coltan ore 10-30 t for immediate sale

Our production of "Ta" in the mine is only made in order form, in 30 days because you are a new customer we can only make 10 Tons, after the customer demonstrate seriousness we can have a production of 50 or more tons for 30 days.
We have a consulting company that represents the 4 mines we have, when it comes to foreign customers, the client contracts with the company and advances 50% of the value, the other 50% is paid when the cargo is boarding the ship.
We worked this way because we had problems with customers in the past they made the order, they did the contract and they simply said they did not have the capital to pay, so we accumulated damages from having a load without a buyer, fuel, machinery rental, transport documentation.

We have Coltan ore (Ta) 50%-60%, quality, SGS test, transport. Please advise if interested in.