Hope you have not wasted your money on one of these over rated pieces of english poo. NO just kidding. Shop around the prices are all over the place on the mk series. A mk 2 is what I have and I love it. Very accurate and not one on every corner like some of the 22's out there. Off the bench the lever makes them a pain in butt to shoot. I tend to shoot prone from cross sticks and that is where the gun really shines. They were made in light weights, it brings the weight down to 10lbs or so the full blown mk 2 weighs in at around 14 lbs so offhand shooting is not real practicle. You might consider 12/15's or model 12's 12's being the older design, but the straight stock and lends itself to bench work nicer than the 12/15 or mk series. The older the series, read 12, the harder is seems to be to find a nice one. Numbers matching on the barrel, action, drop trigger assembly now look at the block, trigger group and ejector, all have the serial number on them, and all should match. I really don't care for non number matching guns. Due to the fact they came from english clubs many are being imported in that have miss matched parts. Seems the trigger assemblies pretty well all interchange within the series and the clubs often did not keep all the part together, so once sold to exported mis match guns are out there. Get on rimfire central and go to martini forum. There is a dedicated bunch of martini freaks on there that are always willing to offer a helping hand. John Appleton, MT guns, Randy Davis at Martini gallery and bob adams are all known martini dealers with good reputations as far as I am concerned. Look and enjoy they are truly a piece of art that offers some of the funnest rimfire shooting I have ever had. Best of luck. SN