I’m looking myself and I’m looking at the Mosin Nagant 91/30 at Bud’s for just $119. 7.62 x 54R is the only drawback, although I think Hickok said you can get 500 rds for under $100, and that surplus military ammo is plentiful. That would get a person a rifle and 2000 rounds for around $500.
I’ve got a M91/30. It can definitely reach out there.
Surplus ammo from aimsurplus.com typically runs about $80 for a 440 round spam can.
Military C&R guns are some of the most overlooked values out there. (I love my CZ-82. It’s my favorite EDC. $200)