You can find basic locks starting at around $10-$20. These are suitable for cheap bikes and low-crime areas. Mid-range options cost around $30-$60, while the sturdiest of bike locks can cost as much as $100-$200.; If you have a fancy bike with lots of removable parts, spending money on a super sturdy lock is a smart idea. If you plan on using extra locks to secure your seat and wheels, that will set you back a little more.