Purchasing a Rabbit
Where should I get my bunny?
I suggest buying from a breeder rather than a pet store. When buying from a pet store, you don't know what kind of living conditions the rabbit lived in before it came to the store, and this can be a very dangerous situation. The bunny was most likely given to the pet store because the breeder didn't want it for a variety of reasons. If the bunny was living in unsanitary conditions before it came to you, there are alot of health hazards involved. So just don't get yourself into that mess and instead get it from a well-known and trusted breeder. They can provide you with a lot of information, tips, and things like a pedigree so you can show your rabbit if you wish to.
What do I need to check for?
Check out the facility the bunny has been raised in. Make sure the bunnies have:  
-Sunlight: This is important for the well-being of the bunny, and I've found that keeping a rabbit in a partially sunny enclousure tends to improve the rabbit's disposition.
-A source of heat for winter and something like a fan to cool them down in summer
-Fresh feed and water. It's very important that a bunny never becomes dehydrated. If a bunny doesn't have water they won't eat, and the results of this carelessness can be fatal. The water should be clean, bacteria or build-up in the water (or mold in the food) would cause serious illnesses for a rabbit.
-Proper housing: There shouldn't be more than one adult rabbit it one cage, crowding can cause problems like fighting or an accidental mating.
-Sanitary souroundings: Clean cages, drop pans, clean food dishes and water, etc.
Also check to make sure the rabbits themselves are healthy with no signs of disease including dull eyes with resedue in them, thinned out fur, sore hocks, a runny nose, loose stool, or trouble breathing just to name a few.
Make sure you know what breed, age, and sex your bunny is. Study the breed in the Standard of Perfection handbook if you plan on showing your rabbit so you know more about the breed characteristics. Check with a few different breeders before you make the big decision. This way not only will you be able to see a variety of breeds and colors, but you'll also be able to compare prices and know that you are getting a good deal. I assure you by experience that bunny people tend to be very friendly and helpful, so don't be afraid to ask any questions.
 What should I get for my bunny?
Before take your little fluffball home you should have the housing prepared; you wouldn't want Fluffy to have to live in inappopriate housing just so you can get him home sooner. You can buy a cage from a pet store, a cage supplier such as Da'Mars, or you could even make your own. There are lots of different designs to chose from and you'll want to make sure you pick one that suits you and your rabbit. It should allow moving space for your bunny and room for a water bottle or crock, feed bin, a litter box (if litter trained), and any extra toys you want to spoil your new baby with! A good size for Jersey Woolies is 24" by 24"- the bigger the better and the happier the rabbit will be. Just don't overcrowd the rabbit with too much stuff. I highly recommend that you take your bunny out at least once a week to run around the house for a while, or make a bunny run that they can get excersize in outside every now and then. If you go to a pet store there should be plenty of helpful employees that can advise you on the brand of feed to buy for your specific bunny. I like to add rolled oats to the feed to prevent diareaha and barley to improve coat condition.
In Conclusion
So as you can see, in order to own a bunny there is a lot of preparing involved. Read up on rabbits before getting one of your own. My mom made me, and although I was eager to purchase my bunny then and didn't want to wait, I'm glad I did. Remember to make sure you know what your getting into and to buy your bunny from a reliable breeder. Keep your bunns happy by keeping their suroundings clean and feed/water fresh. Pets teach responsibility and make great companions too!