It's not very expensive in nowdays.
Just compare:
https://coinmarketcap.com/exchanges/coinsmarkets/
https://coinmarketcap.com/exchanges/yobit/
P.S. Talking about Cryptopia...
I've heard that it's about 5 BTC for Cryptopia's listing, but it is VERY expensive.
I guess yobit is more reasonable decision then crypti, especially if we'll take into account the volume of trading.
https://coinmarketcap.com/exchanges/cryptopia/
Cryptopia is a bit expensive now, maybe in the near future.
I´m also waiting for response from Bleutrade, Coinexchange, Novaexchange and stock.markets.
Well !