Back again!
Snark SN-2 guitar tuner - $9.99 at Amazon
Snark SN-2 All Instrument Clip-On Chromatic Tuner
Link: http://www.amazon.com/gp/product/B003VWKPHC/ref=ox_sc_act_title
This is a great tuner especially at this price and this is as low as it's
ever been at amazon.
Here's the former thread from a few weeks ago:
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The last time these only lasted about a day at this price.