Well you could always inquire about buying it. Company I used to work for spent only $15,000 to buy one.
Originally Posted by tonygreek
All 3 letter domains were taken years ago. Only chance is catching an expired/deleted one (good luck). For example, PLM.com was registered in '96 and is next set to be renewed in 2015.
I agree with at least trying to keep platinum in the domain, however you're going to have a difficult time finding usable names with it. "Platinum" is one of those high-cachet words that is also popular as an exact match word. For instance, platinumLM.com is taken.