Uh, you don't have to buy three from DRE either.
$70 each or $199.98 for three, shipping included.
Patrick charges $65 per sensor with a $5 minimum shipping/handling charge.
Other than the label it doesn't appear there's a difference in the sensors themselves, and the price is very similar. Its a buck here or a buck there... I buy things from both DRE and Oxycheq (he makes great wings too
)