Help, I need to buy a torque wrench

HF 12 buck 1/2 drive clicker. Seriously, ±3-5 % and can be adjusted if you take the end cap off to show the allen screw and lock nut. Chuck it against a beam style and set to 100. Torque it until it clicks and look at beam scale. ypull probably need a helper to watch it. Factor in deviation and your set. I used one and a Snap-on and they read the same torque on a head bolt. A guy tested 10 clickers and beams on a weighted jig and all were within 5 at 100 and within 2 at 80. Not bad. Aerospace needs yearly certs, $$$. Snap on told me 50 to calibrate theirs, 70 if i needed a certification. Ouch. Store all relaxed and loosen slowly.

http://m.instructables.com/id/Fixing-and-Calibrating-a-Clicky-style-Torque-Wrenc/?ALLSTEPS