Yes they may be legal but price is a good indication of quality and service. Check spare parts availability, lithium batteries, bike should have gears, be rated either to a maximum power output of 200W or have EN 15194 compliance certification. We find that customers prefer to buy from a retailer who stocks spare parts and accessories for their e-bike including replacement batteries, chargers, controllers etc. We also find many of our customers return their bikes for servicing with us or our partners for peace of mind for the ongoing maintenance of their bike. Initial purchase price is only the start of the journey. If you do decide to purchase a second-hand bike, please ask for a battery health report before committing.