Interesting .pro. I thought about regging it myself. I didn't because I couldn't find any record of the word International being sold as a single word in other domain extensions and at 13 letters I think it's too long for .Pro to carry.
On the plus side, the keyword has a good fit with the extension, international is a popular prefix and suffix for company names, and it's commercial. I think you'd struggle to get more than reg fee now but if reg fees fall and hundreds of thousands of .Pros get registered, you might get alot more.
Development wise, it's a excellent name for an International directory of professionals, an international recruitment agency, or a site that advises people on working overseas. Good luck.