Go to Walmart or Academy. Get a Simmons 8-point 3-9x40 or 3-9x50. Both are under $50 (seems like the 50 mm was $59 and the 40mm was $39..) and I've had one of each on two truck guns that get thrown around for the last 3-4 years and I've never had to adjust them even once. One of them laid in the back of a mule on a 4 day mtn hunt and it's still dead nuts. Can't beat em for around $50!