now it's my math that was wrong
$250,000 owned in thirds
you already owned 1/3 so there is no further step-up in your tax basis in this portion
as did your uncle and grandma so each of you had $50,000 in tax basis from the 2012 inheritance
but since you and your uncle inherited your grandma's 1/3 the 2012 value doesn't apply to this portion. it's
is 1/3 of the $250,000 split 50/50 or $41,667
