My tactic for any purchasing the newest generation of console gaming systems, is to wait a year and half minimum until I buy one. From my personal experience, I have observed that market prices begin falling after 18 months [sometimes it varies sooner or later], after the hype as died down and the console companies have made a return of investment, thus pricing will be lowered to attain more customers still holding back from buying or untapped market area of people who were willing but did not have enough to purchase. More over, the initial games leased for sale are mostly filler games and not worth buying for its price.
Another tactic I do is look for used consoles being sold for less than retail price, but I will only buy if it is 1/3 cheaper.