If you are looking to purchase Bird Cages for Containment purposes, there are several key points to consider.
Following is a list of things to keep in mind while shopping for your new bird cage.
Size Matters
The size of your bird will be the biggest determining factor in what kind of bird cage you purchase. If you have a larger bird, such as a parrot, macaw, cockatoo, or toucan, you will automatically wish to purchase a large bird cage. However, if you own a small pet, like a parakeet, cockatiel, finch, or lovebird, a smaller cage will suffice.
Bird Cage Pricing
Depending on the quality, bird cages can run from under $100 to well over $500 for a large, quality cage. There are some lovely decorative cages for smaller birds like finches that are reasonably priced, while large birds can enjoy a corner cage that is more space-efficient for your home.
Cage Appearance
While the appearance of the cage might not matter too much to your bird, 
there are different material and paint options that might make a difference to you. Most cages are constructed of metal, be it wrought iron, steel, wire, or stainless steel. Many metal cages are available in a variety of colors as well and are not limited to gunmetal grey. For smaller birds like finches, wicker bird cages are also an option.
Cages are available in a range of sizes. While the square or rectangular cage is most familiar, there are cages that fit in corners, offer a "playtop" with a perch, or have a domed top. Round bird cages are also attractive, as are the decorative cages. A cage with a stand will put your bird up higher out of the draft and give it more of a chance to interact with you.
