Letter prefixed .org's don't really seem to command high prices.
I own some epic i(geo).org's of the best US cities (New York City, San Francisco, Chicago, Portland, etc) that I absolutely love since org is so perfectly synergistic with geo- and I will develop them out eventually (big plans for i/Chicago), but from a reseller standpoint, i/e prefixed .org's don't seem to bring that much. I hand-regged a lot of them and there are still amazing i(keyword).orgs sitting out thre.