$15? Hmmm... I saw those at $10.99 at my local CompUSA all though they were in green. I did read that the db's they state is the low end. They do not mention the high end db's. I think someone measured the db's on their own and got something into the mid to high 30 db's.
Also, I believe they they are not PWM's if that is what you are looking for.
Are the Scythe GentleTyphoon D1225C12B5AP-15 120mm Case Fan PWM's?
I hope so!