Binance - 50 BTC
Poloniex - 30/50 BTC
COSS - 40 BTC
KuCoin - 30 BTC
HitBTC - 45 BTC
Cryptopia - 15 BTC
CoinExchange - 2/4 BTC
LiveCoin - 4 BTC
btc-alpha - 3 BTC
Meratox - 2 BTC
Crypto.bridge - 1 BTC
YoBit - 2 BTC
Stocks.Exchange - 1 BTC
Crex24 - 0.15BTC
Bitfex - 0.15BTC
BiteBTC - /USD (for 1 btc fee);/BTC (for 0.1 btc fee);/ETH (for 0.1 btc fee);Listing in other pairs is also possible for small fee 0.05 btc.
Wow, I never realized those popular exchanges are so expensive.
From the list above, Soldo listed on Crypto.bridge would probably make the most sense. Also having SLD/ETH pair would be interesting.