I need help finding a PS3?

I want a ps3 but it would take 6 months to save up $500. I get $20 a week. I'm looking for a job but I live in a small town of Plum Branch SC. And with gas I can't afford to go to another city to find a job. I have a 360 with two games but I'm don't want to sell it. Is there any websites I could buy one around $200 to $300. Because it would take less time to save up $200-$300 than $500. I want a ps3 b/c I like to play god of war 1&2 and MGS4. I'm a big MGS fan that I got to play it but I don't like to wait. So I hope someone can help me.