Wanted for a primary school: outgrown scooters

My son's primary school is developing its outdoor play options and are adding a scooter track to playtimes. If anyone has any outgrown scooters which are suitable for 5-12 year olds, two or three wheeled, that you'd like to donate, or we'd be happy to buy them for a reasonable fee to save the PTA buying new. Must be in good working order but can be scuffed or dirty!