Walmart offers the Huffy 12-volt Electric Green Machine Scooter for $49 with free shipping. That's $30 off list and tied with our June mention as the lowest price we could find. (It's around $8 cheaper than what some third-party sellers charge via eBay.) It travels up to 8mph and features a steel frame and rear foot brake.
Before you spend another dollar on items and services like these, check with your public library. You will likely be surprised by what it offers for free.