Over a month ago Dell (DELL) announced its planned $24.4B sale to its founder, Michael S. Dell. But a number of shareholders have complained that the price he's offered is way too low. Still, as the stock trades well above the $13.65 a share that Dell has offered, he may have to raise his offer. It won;t come cheaply, reports the New York Times. Its analysis is that raising the bid by a dollar a share would cost about $1.8B, so getting to the $15-a-share bid that some analysts see as necessary would add about $2.3 billion to the deal’s price.