How many sites per IP?

Hi,
I plan on using a VPS to host my micro niches and was wondering how many sites can use 1 IP? Is it best to grant each site a new IP?

Also, Godaddy will only allow extra IP's with a SSL certificate. If the answer is to add more IP's for my sites are there any suggestions for hosting that allows to order extra IP's without SSL?

Thanks...

Check This http://www.cclassiphosting.com/ . Its cheap and allows as much cclass ips as you want .