Looking for gamestop code that works with used PS3 console

I have a ps3 that is for my blu-ray player use and I want one to go into my room with my dual monitors where my xbox 360 is hooked up so I can play on the monitors. I am looking for a used console and was hoping there was a way to get one for $200 on gamestop.com because I have $120 in credit and want to be playing the ps3 upstairs on my monitor and not on my big screen downstairs. If you are wondering by the refresh rate is high on my big screen when it is very low on my monitors and they are also 1080p. Thanks for any help I really appreciate it.

I am basically looking for a % off coupon or if there is certain times of the year they come and go just looking to get final price to 200 at Gamestop.