Remitano is a P2P escrow exchange and not in every country, so for different type of coins, why will he go through remitano ?
His best bet is to both go to coinmarketcap and do his proper findings from the first top 100 coins and start from there.

On coinmarketcap, the exchanges where those coins are available are also listed but he can limit his search to Poloniex, bittrex and binance, and then buy those coins there. However, it is not reasonable leaving them on an exchange, so he may want to find a good cold storage for them.