8. Can a purchaser re-sell the property after signing the provisional sale and purchase agreement?

Yes, but check whether such action is allowed in the provisional sale and purchase agreement before doing so. The existing purchaser will act as a "Confirmor" and the new purchaser will act as a "Sub-Purchaser" in the transaction. Since it will involve an additional party, special attention must be paid to the timing of payments, the discharge of any existing mortgage, and the handing over of the flat. Additional stamp duty may also be incurred.