Call for an atypical MLM?

They want a $4,000 fee that they will even finance. Supposedly working with a 30-year-old firm, selling medical devices--dropping dollars to intice the porential mark. They will do "all of the heavy lifting" and provide the sales leads. They will not identify themselves, and after listing to some anecdodal testimonials, eventually drops the $4K cost, and then forwards you to leave a voicemail. At no time do they identify themselves.