all domains can be developed. That is a given.
But not all domain names are born equal.
The domains names you have have a higher than normal development potential because of their inherent value.
It is hard to put a price tag on them.
If i had them, I would develop them ASAP.
as is though, IMHO, the average for each name as is now and assuming a sale to resellers ranges from low $$$ to mid $XXX (and even possibly high $XXX on a couple).
Thats my opinion.