recently around Christmastime I was having a really hard time sleeping. So I went to Walmart and bought all the pillows. The $12 king size pillows are really hard to use. The $8 medium are too hard. The $4 standard pillows were just perfect. I bought the $3.33 ones this year for my cottage and they're not quite as good as the $4 ones.
That being said I sleep with at least 4 pillows, up to 6 or 8 pillows. So the $4 ones do me just fine.
People who sleep with only one pillow, even if it's a $500 pillow, are uncultured swine. How the heck do you not have one between your knees when you're sleeping?