WTS 500 for 1.5 BTC private message
that's double the current price. You ask for 0.003 each while the price is 0.0015
try to buy 500 seed right now and see what u end up paying

I don't think Bittrex calculates the price like Polo or Mintpal does. It does not take into consideration the amount of coins in total. Like if you were to click somewhere in the millde of the column, and then type in 500, it simply multiplies the clicked price to the 500. It is rather dumb, because it does not take into consideration the TOTAL BTC/SEED to reach that price you clicked.