I always thought the whole point of overclocking was to end up with more processor than you paid for.
Example: I bought a P3 650 about this time last year, and was able to run it reliably at 910 with no fancy cooling. At the time, buying an 866 P3 was over 200.00 more bucks than was the 650, so that was great bang for the buck.
Now, it seems like cpu's have gotten so cheap that it isn't worth it to buy a lesser cpu and overclock it.
Example: Reputable places to buy overclocked cpu's have a 1.33 T-bird for around 125.00 or so.
There is no guarantee if you will get a 200 or 266 fsb processor, and you have to have a pretty decent cooler for it.
My question would be, why bother? For about 8 more bucks, you can buy a real 1.33 T bird and not have to worry about bumping up the voltage, etc. And yes, you can get them all day long, the places that advertise them DO have them in stock.
If you could save a significant amount of money, then I'd say go for it, but if you can get the real thing for less than 50 bucks difference on cpu price alone, why bother?
Overclocking just isn't the same as back in the day when you could get a 366 celeron and run it at 550.