Check around your local bike stores.
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.
You could get a bike pump at Wal-Mart or best buy or try this site www.halfords.com Bikes Bike Accessories & Bike Helmets , or this site on how to choose the best bike pump www.rei.com/expertadvice/articles/bicycle+pump.html
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 find mini laptops just about anywhere that has an electronics section. The best place to go for a mini laptop, however, is Best Buy. They're affordable and you know you're getting a good product from them.
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.
monsterscooter parts has them on the internet for $42
http://www.minipocketrockets.com/r32-4-stroke-super-pocket-bike/
The best new mini to buy depends on personal preferences. For low price, the Mini Hard Top is the best choice, while for performance the Mini John Cooper Works is best.
Buy a new one.