Do you think i should make a search engine for classifieds?

do you think i should make a search engine for classifieds? i am almost finished making a website to search all the online classifieds and place the results all on one page. however my role model who i always discuss things with said that it is an idiotic idea, while i think its a great idea. do you guys/gals think that i should continue with this project or should drop it?