Hey guys, dumb question. I know next to nothing about cuff titles but I am putting together a RMBO/diplomatic insignia display. I see in period pics that RMBO wore a "OST" cuff title. For the last month or so I have scanned pretty much all of the main dealer's sites but have never seen one for sale. Are these a rare title, and if they do come up for sale what can I expect to pay for one? thanks guys.