1. If buying a second-hand house, the buyer does not need to pay the maintenance fund separately, because the maintenance fund is paid in one lump sum when buying a house, and is managed by the owners' committee or the real estate administrative department, and the right to use it belongs to all owners.

2. The maintenance fund is based on the principle of "money goes with the house", that is, the maintenance fund of the house changes with the change of the owner of the house. The maintenance fund is earmarked and may not be withdrawn. Therefore, in the second-hand housing transaction, the maintenance fund of the house can only be transferred to the new owner with the ownership of the house, and cannot be extracted separately.