There are exceptions to the rule, but overall exotic pets take more time, money and work then traditional pets like dogs and cats. Also, many exotic species carry zoonotic diseases like herpes, salmonella and rabies.
The Internet is a great tool for finding hard-to-locate items like antiques and information. However, mixed in with all the great tools, shops and resources are bad sites conducting nefarious deeds. Some of these sites are illegally selling wildly-caught animals for sale to unsuspecting would-be pet owners. It is up to you to conduct the adequate research before you purchase. Your options are to talk to a veterinarian or contact a reputable pet store.
No. They require more care, time and money. They are not domestic animals; taming an animal and gaining its trust takes a great deal of time. They also can be more expensive. They require specialized veterinary care, diets and housing requirements. Adequate care for exotic animals can cost thousands of dollars.