Sector 86 buyers: What unexpected costs hit you at possession?

Spent the whole Sunday checking out options in Sector 86, including a project by Alpha Corp. I work in real estate, but buying for myself is a different ball game. Builders always quote a base price, but the total acquisition cost feels like a moving target. What hidden charges did you guys face at possession? I'm talking maintenance, electricity, club fees, maybe even some unexpected PLC adjustments. Also, is pre-launch pricing truly a discount, or just a hook for higher floor rise later? Looking for genuine experiences, off the record.