Homer Laughlin mugs

I and my grandmother bought a set of six Homer Laughlin mugs from a resale shop a few days ago, and she has asked me to research them and see if they're worth anything. They're a cream/ivory/antique (aged) white color, just barely over three inches tall, old by our guess if going by appearance, I believe they're from the "Restaurant Wares" line, and the stamp on the bottom says "Homer Laughlin Best/Boot/Bsol China U.S.A. SC" (we can't figure out which of the three B words it is, or if it's something different).