Buy chicken breasts
buy Lean red meat
buy fish if you like it
Look around for meat on special, as all bodybuilders need large quantities of meat try to buy in bulk. Ask the butcher you like if they will reduce the price if you buy a few hundred dollars worth etc.
Alternatively, if you shop at wollies or ALDi etc, and live close to one, buy the meat that's reduced for consumption that night, that would save lots over time.
At the end of the day, buy the best and cleanest food your budget allows and don't feel silly asking for a discount.....remember, if you don't ask you don't get.