Yep, same this happened to me.

Just got a call.  The message was some guy trying to buy my timeshare.  He said he works for corporations that buy timeshare and are starting to buy housing now for the 2011 and 2012 years. He gave his name as Ken Parks with a call back number of 719-294-7878.  He did not give a company name.

Same exact thing happened to us.  I'm pretty sure it was word-for-word what he said to you.

This also happened to me.  This was the exact message I received because I just listened to it again.  He did not identify the company he works for.