https://propdex.ai/ 2026-08-18 https://propdex.ai/privacy 2026-08-18 https://propdex.ai/terms 2026-08-18 https://propdex.ai/rules 2026-08-18 https://propdex.ai/rules/absd-sell-first-or-buy-first 2026-08-18 https://propdex.ai/rules/sellers-stamp-duty-holding-period 2026-08-18 https://propdex.ai/rules/cpf-usage-limits-property 2026-08-18 https://propdex.ai/rules/hdb-wait-out-period-private-property-owners 2026-08-18 https://propdex.ai/rules/hdb-grants-ehg-phg 2026-08-18