Why are NPR radio stations usually at the low end of the FM band?

Question

Everywhere I've been, they're somewhere between 88 and 91 on the FM dial. Are frequencies on either end less prestigious/less costly than frequencies towards the middle of the FM band?

Answer 1

when the fcc decided to set aside certain frequencies for "public radio"...those were the frequencies they decided on maninly because commercial station owners didn't want their stations that far "down on the dial"...