buy low sell lor, buy high sell high. your current car probably cost you close to nothing if you trade in or earn if you try to diy sale.
all same same.
to really buy low sell high, need to have multiple cars, like properties. coe supply will even be lower till 2024, so unless economy tank so badly, coe premium will go up.. then again, used cars are not selling as well now though recent 1-2 weeks have more transactions.
btw, you can really bargain till you buy around cost price for now.
use this to bargain.
http://motorcal.co/car-arf-calculator.php
I'm able to purchase at below cost price at last coe closing.