These are 2 mountain bikes my brothers bought from Costco each of them costs about $300 They didn't take care of the bikes so they're not in the great shape at the moment you will need to take it to a bike shop!! but once you get to the bike shop and get repaired its a great mountain bike 

This Northrock mountain bike is the perfect choice for any outdoor enthusiast. With a 29-inch wheel size and disc brake - mechanical, this bike provides a smooth ride and reliable stopping power. The black aluminum frame is lightweight and durable, and the fat tires offer excellent grip on any terrain. The adjustable seat ensures a comfortable ride, and the bike also includes features such as an adjustable seat and multiple gears for added versatility. Whether you're hitting the trails or cruising around town, this mountain bike is sure to impress.