Buy a new one.
The Baja Doodlebug mini bike has been discontinued. However, you can still get reconditioned ones (as of 8-10-12) at suggested link below.See related link below!
I think you mean where and the answer is in a mini bike store.
One can buy a mini dirt bike from the local bike stores. Sometimes local community auctions also feature variety of mini dirt bikes for very reasonable price.
Canadian Tire stores carry Baha 165 mini bikes $599.00 at least the one in Cobourg Ont. does
look on Craigslist Virginia
india
Often it is possible to buy a mini moto bike at a regular motorcycle salesman. You go to the salesman and ask him for a mini moto bike. Either he has one in his assortment or he asks his delivery man for a catalogue which he can show to you.
You can be any age to buy a mini dirt bike in the UK wether your 6 or 16 you can buy one but you are not allowed to ride one on the road at any age in the UK you would have to take the mini dirt bike to a dirt track and you can book weekly sessions with them so you can go like 3 times a week if you wanted to. So you are allowed to buy a mini dfirt bike at any age you just can't ride it on the road. i hope that's a help.
http://www.minipocketrockets.com/r32-4-stroke-super-pocket-bike/
When looking to buy a women's bike with a baby seat, consider reputable bike shops, online retailers, or secondhand marketplaces for a variety of options to choose from.
Ngk you can buy it at auto zone, advanced auto parts, o' reilly