Cpu Cooler Upgrade

[cpprg]

Hi guys, i have a intel i7 920 with a stock cooler, i want to wait more time to upgrade my cpu so i want to overclock it.
What cpu cooler should i buy? i dont want to spend too much because is
a old cpu , nothing higher than 50$

 

[TechyInAZ]

Cooler Master 212 Hyper Evo.