398742 Questions and Answers Website

I would like to see if someone has or can make a good script for Questions and Answers website. I noticed few scripts that sell from $5 ... $24.99 ... $49.00 and $79.00 I liked Agriya Anova Pro that would cost to much if purchased with all modules and code would still be encoded. I want to know how much someone could make nice Yahoo Answers Clone script just like Agriya Anova Pro. Or can someone clone this script with all modules for lower cost? Please let me know and show demo.