I have a timeshare unit week at the Vidanta complex, Neuvo Vallarta

Several real estate agencies (based in USA) for several months have (on an unsolicited basis approached me about selling my unit.

I connected with one of them - he said he could give me - 4-5x the amount of my purchase price.
He told me his real estate agency (for the offer to purchase my unit) represents Accor.

I was told that by buying my unit at this extravagant price- Accor actually gets a tax benefit in USA.

I know most Mexican time share offers are scams.
The question is whether this is a scam.
I have a virtual appointment with a real estate agent tomorrow at 2 pm EDT.

The agent has already told me the following:
a) full money will be deposited into my bank account (once they receive the paperwork)

and
b) I can pay their commission a few days later- from this amount.


The areas of concern on my part:

a) if I sign the forms- even without any transfer of money- do I transfer ownership to this company
b) I was told about closing costs in a previous phone call- I suspect I will be asked to pay this amount up front- then if this is a scam- that is the last I will hear of this person or this company or my ownership with the 2 bedroom unit.

Is there any way that this is a legitimate offer and Accor is indeed the company interested in my timeshare until, at this very exorbitant (from my perspective) price?