You can buy refurbished 15-inch 2018 MacBook Pro models from Apple

Apple has just added 2018 models of the 15-inch MacBook Pro with Touch Bar to its refurbished stores in the US and Canada. So, if you’re on the lookout for a cheaper model, now might be the time to act. The laptops have a 15 percent discount compared to the brand new models. Apple promises these models are thoroughly inspected, tested, cleaned, and repackaged. All come with the manuals and cables that came with the brand new models and you get the standard one-year warranty effective on the date the notebook is delivered. You can also get three-year warranty if you purchase AppleCare+ for Mac.

Source: MacRumors