Where can I buy some coins with the cheapest price? Too many exchanger & trading sites out there, you don't know which is the best one.
If you have friends who have many coins, you can buy the coins in your friends. Surely the price offered by your friend is much cheaper than the price anywhere. Then if you buy it from a friend you can also offer to get a coin with the cheapest price. The important coin you want to buy does have a good prospect so the future of the coin can be more developed.