Definitely the same group. Corporate Acquisitions from Colorado. They use GotVMail.com which provides local numbers around the country. Makes them look like they are from Western Mass. Call the number and you will get a voice message and a long list of voice mail boxes for all the people at Corporate Acquisitions.
I just received a message from the number, identifing themselves as the Corporate Acquisitions Group. Said to dial extension 710 and ask for Rick Webber. Said they had a "Top-dollar buyer" for a business in my sector. Yeah, right....