Smart travel dk402 upgraded 41 mph

Just got this bike but my cousin let me ride his surron and yea I need something more faster. This is not a need to sell. Im selling my smart travel dk402 . So a brand new smart travel dk400 is 800 mind you it's only 28mph and max range is 45 miles. My bike goes 41mph and the range is 60miles. Its has a 30amp controller and a 48v 15ah Eureka battery, which is $500 alone. Lcd screen for speed and range, also has 5 modes. 1: 0-11 mph 2: 11-21 mph 3: 21-29 mph 4: 29- 34 mph 5: 34-41 mph Bike has rugged good condition tires, brakes etc. No scrapes no crashes comes with a 5a fast charger as well. Battery also let's you charge devices while it's off. No low balls If I had the space I'll keep it. Price is firm. Open to trades ( DIRT BIKE STYLE EBIKE THAT GOES AT LEAST 50MPH)