I have bought from them previously and there fees at that time were $425, include the resort transfer fee of $25. I recently (within the last month)contacted them about making an offer on a unit with an asking price of $7,950 and below is their list of fees presented to me.
closing costs:
(record new deed) $375
GMAC admin fee: $195
(includes 1 year I.I.)
Marriott transfer fee: $25
My experiences with them have been positive, but they do charge their so called "GMAC Admin Fee". In my experience, they have always been upfront about what their costs are and don't try to hide anything. Also, you can always try to negotiated on Admin fee, but have no idea if they would be willing to reduce that or not.
Gary