Freelance.pro sold for $5,697 today. That was only registered in June 2007 so not a bad return on reg in 15 months. Maybe Carter and Stewie can tell us what they registered in the last 15 months and sold for $5,697? .pro is an elite business oriented extension, not everybody can register it, the people who can have more money than the average domain buyer.
Keyword wise you get 10,000 times better value for money buying a .pro which has maybe 7,000-8,000 domains registered than a .com that has 77m words registered. Every .com registered today, yesterday and in the last 5 years is trash and the people who register them are sheep. Domains like Freelance.pro are memorable, brandable and quick to type. If you didn't get Freelance.com in November 1998 don't keep registering inferior derivatives with 2, 3 or even 4 keywords, get a new improved version of the original single word with a catchy business friendly extension like .pro.