Extremely price sensitive... I too saw the new Lee Child. I PASSED at $15. Same for John Sandford... Until these things get down to a reasonable price - and reasonable for me is a lot less than they want for the paperback - I"ll pass.
There's way too much readable stuff out there to be paying $15.00, or even $10.00 when I go through 100+ books/year.
Oh, and as far as reader price - If I bought a $50,000 car instead of a $25 beater, I'd STILL care about the price of gas and get it where it's most cost effective.