As the Best Buy Member Deals Day sale rolls on through Sunday, its Deals of the Day page is now offering a relatively rare deal on the Shark MessMaster Portable Wet/Dry Shop Vac. It is now marked down to $89.99 shipped for everyone at both Amazon and Best Buy, but paid Total and Plus members at Best Buy can knock the price down to $79.99. Regularly $130, this is at least $40 or 31% in off and the lowest price we can find. The best we have tracked on Amazon all-time is $80, for comparison, and we have only seen it drop below $100 there a few times this year.