I have been offered a Merkel 140AE in 450-400 Nitro Express 3" that I am considering for a hunt for buffalo and elephant in 2019. It has been fitted with EAW turn in scope mounts, and a Burris fastfire red dot sight. It has shot less than 40 rounds, and appears as new. It has plain wood and simple scroll engraving. It is a private sale in Canada for the equivalent of US $7150. From those who own Merkel doubles - is that a good $ deal, and are there any tips you can give me about common faults or things to look out for in a used Merkel double? I am used to double shotguns and have owned a couple Merkels but never a double rifle. Any tips appreciated.