Even when these models were brand new from factory, other owners of this model weren't completely happy with its sometimes sluggish electrical contact which can affect operation. It is used, but really has probably had no more than 5 hours of continuous layout operation in the 10 years or so that I've been its proud owner!
But, you should look REALLY CLOSELY at the photos to see if you find a major issue that I missed. Note the factory installed decoder is a Minitrix DCC/Selectrix dual-mode decoder.
That means it can work in both your normal DCC system as well as the less common Minitrix Selectrix system (which no one has). While this decoder works like any other for the most part, they can be a little fiddly compared with more common Digitrax decoders. It is currently programmed with Locomotive address 7.Honestly, if you Google search for "Minitrix 12440" you'll get many images of this train from my blog! The item "Minitrix 12440 Ram TEE DCC + Sound" is in sale since Wednesday, July 18, 2018. This item is in the category "Toys & Hobbies\Model Railroads & Trains\N Scale\Locomotives". The seller is "joemesmero" and is located in Snohomish, Washington. This item can be shipped to United States, all countries in Europe, Canada, Australia, Japan, China, South Korea, Mexico, Chile, Colombia.