Del. Code tit. 25 § 734
The Court may, in its discretion, direct that sales made under this subchapter, be made upon credit, either as to the whole or a part of the purchase money, the payment of the purchase money to be at such time and to be secured in such manner as the Court in the order of sale prescribes, or in the order of confirmation directs. The Court may order and direct all such acts and proceedings touching the execution of a deed to the purchaser and the securing, collection and distribution of the purchase money, as it deems necessary. If the purchase money, or a part thereof, is secured by the mortgage of the purchaser and the mortgage is recorded within 30 days after the date of the mortgage, the mortgage shall have preference to any judgment against the purchaser or any other lien created or suffered by that purchaser, although such judgment or other lien be of a date prior to the mortgage.
25 Del. C. § 734