my cuz is looking to get a boa bc he was atmy house and he was playing with my ball python and he said he want a snake that is like a boa/python and we started looking at the classified and he found 2 he liked the Silver Back Bolivian Boa and the columbian,
so i have some questions about them

this would be his first boa

how big do they get
what size cage should he get
are they normaly tame
and what is a good price to look for(like a range)

thanks and any more info would be great