There are several options for mini single speed cheap electric bikes available on the market. Here are a few examples: 1. Ancheer 14-inch Electric Bike: This mini electric bike features a single-speed gear system and a 250W brushless motor. It has a maximum speed of 15.5 mph and a range of up to 15.5 miles on a single charge. It also has a foldable design, making it easy to carry and store. The price range for this bike is usually around $400. 2. Swagtron EB-1 Lightweight Electric Bike: This mini electric bike is designed for urban commuting. It has a single-speed gear system and a 250W motor. It can reach a top speed of 12.4 mph and has a range of up to 15.5 miles. The bike is foldable and lightweight, making it convenient for transportation. The price range for this bike is typically around $400. 3. Ancheer Folding Electric Bike: This mini electric bike features a single-speed gear system and a 250W brushless motor. It has a maximum speed of 15.5 mph and a range of up to 15.5 miles on a single charge. The bike is foldable, making it easy to carry and store. The price range for this bike is usually around $400. These are just a few examples of mini single speed cheap electric bikes available on the market. Prices and specifications may vary, so it's recommended to do some research and compare different models before making a purchase.