N.J. Stat. § 3B:23-2
For the purpose of valuation under subsection b. of N.J.S. 3B:23-1 securities regularly traded on recognized exchanges, if distributed in kind, are valued at the price for the last sale of like securities traded on the business day prior to distribution, or if there was no sale on that day, at the mean between amounts bid and offered at the close of that day. Assets consisting of sums owed the decedent or the estate by solvent debtors as to which there is no known dispute or defense are valued at the sum due with accrued interest or discounted to the date of distribution. For assets which do not have readily ascertainable value, a valuation as of a date not more than 30 days prior to the date of distribution, if otherwise reasonable, controls. For purposes of facilitating distribution, the personal representative may ascertain the value of the assets as of the time of the proposed distribution in any reasonable way, including the employment of qualified appraisers, even if the assets may have been previously appraised.
N.J.S. § 3B:23-2