Dragonex is a digital asset trading platform that focuses on Chinese markets and English-speaking countries. It mainly offers cryptographic encryption transactions, but it also works partly with Fiat, as residents of China are allowed to convert to cash-fiat. There are many old coins to trade in this exchange , and these are relatively inexpensive.
At the time of writing, dragonex is ranked 82nd in the volume of trading with CoinMarketCap via Bittrex, Kucoin and other popular exchanges.