Bittrex sometimes even cheaper. Recent bitcoin lows were 1100$ and 2300$. Same story with ETH. There was a period of time when i was able to sell ETH for 170$ and to rebuy it at 155$ to resell at 170$ once more). At the same time the spread on BTC-E was about 5$. Only one thought i had at the time "what an idiots!!!"

Buy the panic)))