First of all, Grand Mayan units that are "affordable" and keep their original benefits are really difficult to find. This is because Mayan World caught on to the resale world about 2005 and made a lot of changes so that it was more difficult to buy resale at a good price. Owners will have a difficult time selling a week if someone has to pay 10 MF to transfer it to their name.
As a longtime Mayan World owner of 6 weeks - 4 MP and 2 GM units (some of these were resale) until 2013, I have listed what I have documented over the years from our various contracts.
Group Mayan Maintenance Fee Timeline & Transfer Timeline
Before August 2002, transfer fees for Mayan Palace units were the cost of Maintenance fees for 1 year. The Vacation Fair week transfers with the contract. (A large majority of these have now upgraded to Grand Mayan and their old units are sold with the new terms.)
From August 2002 - November 2005, it was 10% of the original purchase price.The Vacation Fair week does transfer with the contract. I am not sure they started selling Grand Mayan units before 2003. This was the information for Mayan Palace that was in a contract that we had.
The 5 times the MF to transfer (sell) to another person started in late 2005, just before we upgraded to two GM 2-bedroom units in April 2006. These also had a 5 year renovation fee that is equal to 1 MF. The no pay unless you go feature was new in 2006, but came with an addendum that if you transferred your contract to someone else, the Vacation Fair (bonus week) and the no pay unless you go feature does not go with the transfer.
In 2008, there were some contracts that still had the 5 year renovation fee that was then 1-1/2 the cost of your MF, and still had the 5 times the MF to transfer to someone else.
I am not exactly sure when, but by the time we upgraded to the Grand Luxxe in 2013, the cost to transfer your week to someone else had gone up to 10 times the MF and none of the special benefits, especially the no pay unless you go and extra weeks go with the transfer. The new contracts have some 10 year renewal options which seem to change regularly.
So, if you are going to try to buy a GM week, you should look for one that is a 2004 or 2005 contract. The 10% of the original purchase price transfer fees is less expensive than the 5 MF, and you get to keep the VF week. The original purchase price for a 2-bedroom back then was about $32,000, so $3,200 is less than the $5000-$10000 in transfer fees that you would pay for a "newer" contract with no VF week. You will have to pay MF each year either way.