planes are phased out not sold overnight
the price of 787 and 767 is pretty much the same, 787 has the latest technology, saves a lot more fuel and a better catch for passengers as every one wants to fly in a new plane, so what if you have to wait 10 years phase out your current planes
for me still 787 is the way to go and there is no need for 737's complete fleet 787 and 777 with ATR for local flights