I rarely go to the mall so I didn't even know that Sears carried DVDs (beyond guaranteed sellers like summer blockbusters or kids' movies). The effort is always appreciated though. :)
Only speaking from my own experience, they always seem to over estimate the delivery date so I wouldn't worry. Is your order coming via UPS or the post office?
I'll be picking up Mystery Science Theater 3000: The Movie and Serial Mom. Having re-watched both discs recently, I have to say they were definitely in need of an anamorphic upgrade. I love The Car but the Anchor Bay disc still suits me fine.