Reasonable offers accepted. Happy Saturday

Curious... what do you think is a reasonable offer? I've spent way too much time looking at fans lately, apologies for this. But for $19 you can pickup a Noctua fan with a 6 year warranty. I'm gonna go out on a limb and say that it is a superior fan over the stock S3 piece.
Are there specs/stats for the S3 fan somewhere handy?
I'm not sure I'm understanding the question.. This is a replacement fan if you have a broken fan or want to add a 2nd fan to an S5.