Mexico - CUN Car Rental - CC Holds?

I've seen different numbers mentioned on various car rental sites for a credit card hold to rent a car. I don't recall a hold last time I rented a vehicle (Jeep for a day or two while local), but could be wrong.
In any case, anybody have any idea what the approximate hold is, or if there's any rental agencies that don't put a huge hold on?

I rented a car for a month in CUN. $450 rental + $500 insurance = $1300 hold that fell off after two days. This was with budget.

Many variables. If you do not purchase insurance and have a credit card that pays for damage / loss, it could theoretically be the full value of the car. In Mexico, DO buy insurance.