It's just kinda stupid is all.  Besides, half the guaging interest threads have a price listed, so wtf? 
Off topic...but doesn't the word "guaging" look funny when you type it out?  Or have we all been spelling it wrong?  I know my puter thinks it's spelled wrong.
EDIT:  
http://www.thefreedictionary.com/gauging  Here I thought they were guages not gauges in my car...?  Huh...learn something new everyday.