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A working Nikon D70 you can find for around 70 usd.
Plus an used 50mm 1.8d for around another 70 usd.
Plus a iTTL bouncing flash for 50 usd.
Total: 190 usd.
You may also have to buy rechargeable batteries if you don't own any already.
You can't go much chaper than this.
Off course a better camera will get you much better photos.
This is a D7100 + 85mm 1.8g.