$75 seems a little steep to me, but I've been out of the loop for a few years.
I used to sell them that size for about $45-$50 three or four years ago.
$45-50 may be fair in a LFS, closer to $35-40 from an internet retailer. $75 is pretty steep, and I'd say if it's not a big box LFS, you have a good chance of talking them down.