I would say that any these calibers; .243, 25-06, 270, 30-06, .308, etc. would be just fine. As for make and model, I would recommend anything that you can afford to buy at a decent price, and pass those savings along, while still being able to make money. Think about the demographics of your area and what people can afford. These days, Savage and Ruger are producing very in-expensive yet reliable firearms. Same with optics and ammo. Anything like Weaver and Bushnel in optics, and Federal and Winchester for ammo. As a shopper, I want good quality at a decent price.