Ask500People - "World opinion while you watch!"

I conduct quite a few experiments in my economics classes where I survey all of my students, or have the students conduct their own surveys, but it seems like having 500 respondents from all over the world might carry even more weight.

I have a lesson on markets where the students discuss what the result would be if the US were to allow an open market for buying and selling kidneys. Part of the exercise is to conduct a survey, and take an educated guess as to what the market price would be if such an activity were legal. Setting up this poll was easy, but I'm not crazy about having to put a limited number of price ranges in for the choices (normally, I let the respondents choose whatever single price they feel is appropriate). Nonetheless, I will be interested in tracking the results. Here is my question, if you'd like to vote!