buy walkie talkie...
Its up to you when you buy such things online. The rules may be different in those countries where they sell. In india, to use any transmitter above 0.5watts, you need a valid license. may be an Amateur radio, Marine or Commercial one
Even if you buy it online, it will be held up in customs where you'll be required to clear the parcel with producing valid doccuments with customs duty.
Even still you get it delivered, when you use, if the monitoring stations trace you transmitting, you should be ready for the consequences.
Any way..Good luck.