That's pretty rare though.
It's sad that scam artists like this even exist. 1.51 is a pretty high overclock, but I wouldn't trust a source such as ebay personally. For the folks that keep stating how easy it is to hit 5Ghz+, they really should check out the 5Ghz club thread and see how high voltages really are to achieve that frequency with normal non-binned chips. Voltages I've seen tend to extend well into the 1.5v range (My old MSI motherboard required 1.55v!) and only those with "golden" chips have been seeing sub 1.4 volts to reach that barrier and above.
I have a feeling that a lot of people would pay extra to know they have a binned chip in their motherboard. How many folks have bought into the Costa Rica myth, or purchase certain video cards because the manufacturer states the gpu chip is binned?
Even then, id rather have the fun of finding out for myself and saving the moolah...