An obvious scam. All the warning signs are there. In fact, what makes it appear anything OTHER than a scam?
The Internet is a great breeding ground for scams, but also a great place for protecting yourself from them. Simply search for what you're being offered and add the word "scams" on the end, e.g. timeshare resale scams
http://www.google.co....imeshare+resale+scams
The fact they won't give a company name may be a further indication that it's a scam, because another good search to do is
<companyname> scam
where <companyname> is the name of the company who is making the offer to you. Try it on the name of the company that originally scammed your friend and you'll realise that perhaps she may have been able to avoid being scammed in the first place.