Snark SN-8 Super Tight All Instrument Clip-on Tuner $9.75 w/free ship or $8.09 with site registration
I've never ordered from this site but they have a 14-day return policy with free shipping both ways.
I already own one of these tuners but at this price I had to order another. Now I can keep one on my acoustic and one on my electric. These tuners work great. They are extremely flexible so one can easily read them from any angle. Some tuners I've used waver between sharp and flat but not this one.