Whats the best graphics card pre owned around 50quid

[zebedi]

Hey guys, im looking for a graphics card i dont mind second hand, its just to tide me over a couple of months until i have some more cash.
at the moment i have around £50 to spend what can you guys recommend please?
current sytem specs if needed:
g1 sniper m5 motherboard
intel i5 4670k
8gb corsair vengeance pro series ram
650w xfx psu

Thanks Luke

 

[zebedi]

i was a little impatient so i went ahead and bought a Asus radeon 5850 1gb card, it was bang on budget at £49.33, it seemed to be that or a nvidia 460 , it was a tough decision i hope i made the right choice?