What To Look For
The most important thing to look for in a climbing shoe is a snug fit. There should be no room for toe-wiggling. Instead, your toes should curl slightly. Another decision is whether to purchase shoes that slip on or have laces. The slip-on will afford you a more exacting fit, while the laces will offer you the chance to loosen up between climbs. Bear in mind that there is no way to tie your shoelaces if they come undone while you're climbing.
Common Pitfalls
The most common mistake people make in purchasing climbing shoes is to buy a pair that isn't tight enough. Particularly if purchasing a leather upper, the shoe is likely to stretch a half-size over time. Another common mistake is to try on shoes while wearing socks, even though most climbers use their shoes without socks.
Where To Buy
It is important to buy climbing shoes at a store staffed by climbing specialists. Even better, shop at a store that has a bouldering wall so you can test the shoes directly. Never buy climbing shoes online.
Cost
Most climbing shoes will fall between $50 and $200. Anything over a $100 is likely to be more specialized for specific types of advanced climbing. An $80 pair of all-around climbing shoes would be adequate for most climbing purposes.
Comparison Shopping
Although purchasing online isn't recommended, using the Internet to give you a sense of an appropriate price is recommended. The real comparison should be between different shoe manufacturers. Try several different styles and brands in the same price range and pay careful attention to how your feet cram into the foot box. Make sure the pressure is even.
Accessories
Starting to climb requires more than just shoes. You should also seek out a harness and a chalk bag. The harness should fit snugly and have reinforced seams. The chalk bag should have a drawstring to keep your chalk from falling out. Other accessories will be provided by your climbing gym.
Insider Tips
Go to a wall in a sporting goods store and try out a few different loaner shoes on the wall to see which shoe you prefer.