I think that we are researching the same family lines, with variations in the spelling of names, which was common during this time period.
I have a John Salley married to Nancy Hiscael in Grayson County, Virginia, 1805
They had nine children:
Green Berry- b. 1825, m. Mary Church, d. 20 Dec 1894 in Kentucky Mary b.1807 in Lee County, VA Andrew J "John" b 1813 in Scott County VA d 1869 Henry H. - b 1816 in Lee County, VA m. Nancy Landreth d 1870 Eady Salley -b.1818 in Lee County, VA m Micheal McKinney Thomas Salley - b. 1823 m Matilda Campbell d. 1869 Milley Salley - b. 1825, m. Jonas Campbell Judith - b.1821 Catherine-1828
There was a John Sallee in Powhatan Co, VA from 1782 - 1803 when he "moved westward to seek his fortune after the untimely death of his beloved wife" (Transcribed from the obituary of his father Joseph) Powhatan Co, records indicate a marriage between John Sallee and Susanna (last name unreadable) in 1803.
John Salley is the only Salley listed in the 1810 Lee county Census.However, by 1830 there are several Salley families in the area with names of heads of households which are similar to the siblings of Powhatan Co, implying a westward move of the Powhatan Sallee Family
If in fact John Salley of Lee County and John Sallee od Powhatan Co, are the same person, the LDS Databank lists extensive ancestral information dating back to 1580 in Loire-Atlantique, France.