The following links can help you in your search for most popular guppys. These are official and sanctioned awards and values given to guppies approved by the director and board members of gupshup.
Guppy Stock
http://www.paklinks.com/gs/showthread.php?t=174472&highlight=stock
Gupshup Legends
http://www.paklinks.com/gs/showthread.php?t=151313&highlight=velvet
Guppy of the Year
http://www.paklinks.com/gs/showthread.php?t=238470