well, this might interest some of you, found this for 7.99 + shipping. cheapest I've seen is over $12. I got 2, came out to $23 with shipping. not too bad, hope my gf doesn't get mad, used her paypal fund
The YS tech is louder than the aluminum fan if its turned all the way up, if only because it is slightly higher pitched. The Al fan is definately loud, but it its so low pitched it isnt really bothersome.