Well, obviously there is price/performance as a standard, and when that's the standard, then getting to 4 cores cheaply would be interesting to me, so I think about ways to get there really cheap.
The cheap (or price/performance ratio) parameter isn't the primary concern of most enthusiasts. Only some of us make it the primary, first concern.
Now, as I've said so many times...right now a cheap dual core (with the idea of upgrading to quad via a drop-in) makes sense for the moment. And for overall system performance, and bang-for-the-buck, once you have at least 2 cores and 2 MB, the real bang for the buck isn't more cpu speed, it's more hard drive speed.
Some folks know that already, some don't, some want "proof", some already implemented the advice, to their gain.