Just a thought, but you may consider posting this in the classifieds forum. Ya may be able to pick up a used one for a decent price.
And if you choose to do so remember that laptops have usually a very short lifespan when they're used for gaming. Their small enclosure and typical use enviroments (on beds, chairs, soft lap of your girlfriend

, pillows blocking vents) they are very easily run at critically high temperatures which shorten the lifespan of the components.
It's very typical problem for laptops to lose contact on SMD's due to overheating and botched soldering. That can be possibly fixed by cooking the motherboard in an oven though but at the cost of dismantling the whole thing.
To put it short: Expect the second hand laptop to die an early death - take this into account when spending money.