Core i7 920 D0 Probability

I'm looking to build another computer rig with this processor and am wondering what would be the guarantee i would receive a D0 stepping from a place like amazon or newegg. Over at tankguys they show a d0 in stock, but it is also much more expensive. So im wondering if i would order from amazon or newegg, would i more than likely get a d0 stepping and if i dont would i be able to return it for another chance.

Thanks