Hi there,
just my $0.02 worth and to summarise
When you buy a NEW car in Singapore, you pay taxes / duties / COE upfront.
The COE lasts for 10 years.
Up to the 10th year, if one were to deregister one's car, one will be entitled to certain "rebates" from LTA.
There are 2 rebates:
COE and
PARF
COE rebates are calculated on a straightline. Therefore after 5 years, if your COE cost $30000 orginally, the COE rebate will be $15000.
So for a $101 coe, the rebates are almost nothing.
PARF rebates are slightly more complicated.
A good summary can be found here
http://www.fussfreeauto.com/advice-article9.html
If a car is deregistered before the 10th year, higher PARF rebates apply.
IMPT: All the rebates above are NOT paid in CASH. LTA issues a piece of paper stating your rebates. This paper can be used mostly to offset the taxes for a NEW car in your name. The rebates are transferable. Many dealers will buy paper rebates a slight discount from Par value, usually a couple of % off.
Buying a $101 COE car is only a good idea if you intend to own it till the end of the COE. This is because the underlying value of the car (Paper + Body) is low. However, over 3/4 years, you would be able to amortise this premium and thus, enjoy a "reasonable" annual loss.
Hope this helps
Chris