Depends on how much you want to spend. Look in the phone book for bike shops near you, ask other riders in the area, or go on Craigslist.
Your local newspaper may be a good source for used bikes. Local Bike Trader helps you find used bikes in your area. You can also try the Bicycle Warehouse.
They both are very good bikes, but if i had to choose i would buy a Kawasaki.
PowersportsMax is a good place to buy dirt bikes online. If looking for a store to buy dirt bikes at, simply go to the local dirt bike store, as it varies from location to location
A proper bicycle store with good reputation.
Most hobby stores will carry toy and collectible bikes. Check the local listings to see what hobby stores are in the area and the hours. Calling ahead might be a good idea to get an idea on price ranges.
There are a few dirt bikes that you can buy that are cheap. Some generic dirt bikes you can buy are 200 CC, Yamaha and you can have bikes shipped to you from China.
Basically because, just like Tools, different bikes are good for different kinds of uses. Oh, and since the bicycle industry loves to see us buy more bikes - as that's what they survive on - they do try to make us buy more bikes by making them more and more specialized.
I personally wouldn't buy one but if you ride easy it will last
There is absolutely nothing wrong with the Horizon brand of elliptical bikes and they are widely available. You should be able to find them at most retailers.
are framed bmx bikes any good
Bicycle stores have good bikes, not department stores.
Fezzari bikes are pretty amazing.