Indigos - both Texas and Eastern - run anywhere from $800 to $1200.
Blacktails/Unicolors are $300 to $400.
Yellowtails are $400 to $500.
Rubidus are about the same as Texans and Easterns.
There is some variance. Some people will charge you more for a linebred animal that has no tail color or for a line bred animal that has enhanced yellow (YT).
Blacktails are mellow, as are Texans and Easterns. Yellowtails can be a bit more high strung.