Civivi elementums as previously mentioned are right in that range I really like them.
You might take a look at the Kershaw Iridium. It is around $60 at Amazon. The blade rides on ball bearings and is smooth.Good info here, and assisted open is a plus but not a requirement. I also agree I have liked my Kershaws more than the Spydercos, at least in the sub-$100 range, I am kind of interested in trying Civivi now if it is nicer