Looking at the imdb listing for "It's Your Bet," there have been various distributors of the show: Metromedia, NBC Televison Sales, National Telefilm Associates (all now part of other companies) and one that piqued my interest, SFM Entertainment. Since SFM currently has the tapes of Flip Wilson, Dean Martin and "Laugh-In," I'm encouraged to believe the 630 episodes of IYB still exist. Not that there is a venue for any kind of exploitation, but they are in the SFM holdings.