Is there a website that searches deals of multiple stores at once?

Specifically, electronics? I’ve fought long and hard, and I’ve reached a new level of discipline, but it’s time for me to get a PS3 and have some mindless fun once in awhile.

I haven’t purchased electronics in awhile (the last console I had was a PS2), so I’m not sure if they have deals or if there are coupons that are easy to find. But it would be easier for me if there was a website like this. Similar to an Expedia for electronic products.