There is a groupon for 74% off sealcoating today that I just saw. Osgood Painting & Contracting. 2 car drive way up to 800 square feet for $99 ($350 dollar value) or 3 car driveway up to 1,000 square feet for $129 ($500 value).
Not sure if these guys are good or not but figured I'd pass it along.
Osgood Painting & Contracting Services, LLC Deal of the Day | Groupon Boston