ybc.org is a pretty good combination.
Since mostly nonprofits utilize the dot org space, "y" can be used for "youth" and there are many nonprofits that serve youth. "your" "young" are other possibilities.
"b" is a good letter. Lots of possibilities.
"c" is a good letter but much better for dot com domains because it can be used for "company". Companies should not use dot org addresses because while they can, many consumers find a for-profit site at a dot org extension to be distasteful.
"c" could be used for "club" or "church" which many are found at dot org, "committee" "care" "christian" christians" "community" "city" "catholic" "cares" "crisis"
And for the record, many nonprofits can afford to pay good money for domains. They are businesses that can make profits but they don't pass those profits on to share holders but instead they reinvest profits back into the nonprofit organization.
I'd value it at a minimum of $800 and could go into $x,xxx.