+1 on what syncerus said about Leupolds customer service and their lifetime warranty. Older VariX II Leupolds did not have a locking mechanism on the elevation & windage knobs, but used a slide adjustment that sometimes would move under recoil or being dropped. I was taught to use the plastic handle of a screw driver to tap the adjustment knob after moving it to "settle" the crosshairs into the new position. Give Leupold the chance to make it right.
I had a 4x12x40 A/O Swift Premier Grade for a long time. Decent glass,about 90-92% light gathering rating, never had a hitch with it on any of the 4-5 rifles it ran on, and always held Zero. Quality wise it is about like a Leupold Rifleman/Nikon Prostaff 1 and in that 4x12 model ought to cost high $100's to $200 new. Look at SWFA's website for accurate pricing and a complete description. Another online vendor that sells a lot of Swifts is EABCO.com.
"These are the times that try men's soul's"...Thomas Paine
"Those who fail to learn from History are doomed to repeat it" ....Santayana
"There's a sucker born every minute" P.T. Barnum, on why he always had customers to see the sideshow features.