Here's the info:
Argenitne Black & White: 4.5 feet plus, 15 lbs =/-, very tame/great temperment. I have one and love him.
Red: Just a bit smaller than above. Also very tame/great tmeperment. I know one and almost got one. I have to fight myself by say, "one tegu is enough!"
Columbians: Smallest of the three here. More in the 3-4 foot range. Reputed to be MUCh less "tamable". I handled many in the pet storeI worked in while in high school and would "tend" to agree.
Any animal can only be tamed with lots of time and effort on your part. Animals are also individuals. You may find nasty reds and tame Columbians.
Price reflects the general tameness. Expect to pay $100-$150 for reds or Argentines. Columbians can be had for much less. See others on this list for their opinions. They may differ.
Hope that helps,
Brian
