I just got an email from LivingSocial and there's a photobooth rental for $399 for 5 hours.
I don't know a lot about this company, so I cannot recommend them, but I wanted to pass this along!
http://livingsocial.com/deals/51261-five-hour-photo-booth-package/social_share?ref=addthis-share5&rui=501018015 hours cost us $800, so this is an awesome deal.