Depends on what tour you mean to be honest.
$20,000 each
A bentley in Mexico cost $200 pesos
its free
The cost of a complete tour is (from June 2014) 45 lei (cca. 10 euros).
There are Universities in Mexico that are free to its residents.
about £20 - £30
I think it depends on the company
idfk
12.99
it cost $145
@ Livenation.com they cost $32+ tax, but they are sold out now. :(