I do listen to your advice, but the biggest problem is that full 512 sets are very rare on the market nowadays, so if I won't buy it somebody else will for a much higher price since in the past week about 6 or more people made threads about buying full 512 and none were offered. If you really need an item, then you don't have much choice. I know that before, full 512 were sold much cheaper, but times have changed.