I heard BCC will have rate about $300 - $400, but I dont know this is true or just an issue
Actually, BCC is already on the market. Check ViaBTC and HitBTC you can do buy and sell but on both exchange price is different.
I think BCC will be dump after Aug. 1 since a lot of Exchange will not support Bitcoin Cash and will only chose Bitcoin/BTC.
Yeah many exchanges would now support BCC because of their loyalty in Bitcoin only hehehe better not to entertain this hard fork coin lol. For it's a nice decision that poloniex exchanges is not supporting this coin