Im writing a paper, and I was wondering where I could find some price approximations for video ads on websites like maniatv.com and ifilm.com
Contacting those sites directly didn't yield much success. Can anyone give me a rough educated estimate?

you could try www.elance.com , define your project, then ask for an estimate...should give you a ballpark range

Do you a more direct link to the quote form? I cannot find it.