Hi NineDSix
4 letter .orgs are still out there for the taking. Many are still available for registration.
HDLS can have value to an organisation where HDLS fits perfectly or if a similar named organisation is looking for a shortened domain.
It's difficult to price a 4 letter .org because it all depends on the size of the organisation - and you have to remember that organisations are non profit.
Have you tried researching to see if there are any organisations that may suit this name? Namebio.com may assist you with previous 4 letter .org values.