What are some good electronic stores to go to to get movies from in Az?

ok i live in phoenix and i was wondering where i could find: mystery women ( all of them) dignoses murder and murder she wrote. I went to best buy and they onl had murder she worte so wher eles can i go to get them all for a pretty good price?? and yes i have tried to rent them but they once had one myserty women and nothing eles! so please help! i REALLY need! them! i havent seen them in a while! and p.s. mystery women is a hallmark clic so fyi lol if that helps!!!! thanks again and bye!