What about CampBX? Do they not look legitimate? Their price has been low, and liquidity pretty small, I even wonder how/why are they continuing this business, it doesn't seem profitable at all.
It is a bit difficult to get fiat in to CampBX, and there are max account sizes. I don't know why.
Possibly the engine is not mature, there are lots of limits there.
CoinMKT.com is about the same price, slower site for some browsers but you can do a lot more, and it also has a good number of Alt coins..